Herr Deng桑的教學blog: ex6 C++亂數練習

2016年10月14日星期五

ex6 C++亂數練習

36 則留言:

B10333054 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年10月14日下午4:25
B10333049 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年10月14日下午4:25
B10333016 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年10月14日下午4:25
A10433015 提到...: #include <iostream>
#include<cstdlib>
#include<random>
#include<ctime>
#include<cmath>
using namespace std;
int main(){
int seed = clock();
mt19937_64 gen(seed);

normal_distribution<double> x(70, 10);
int a[1000];
double sum = 0;
double s = 0;
double sum2;
for (int i = 0; i < 1000; i++){
a[i] = (int)(round(x(gen)));
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9){
cout << endl;
}
}
sum2 = sum / 1000.0;
for (int i = 0; i < 1000; i++){

// s += (a[i] - sum2)*(a[i] - sum2);
s += (a[i] * a[i]) - (sum2*sum2);
}
s /= 1000;
s = sqrt(s);
cout << sum2;
cout << endl;
cout << s;
cout << endl;
cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");
return (0);
}; 2016年10月14日下午4:30
b10233072 黃宥婕提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:31
A10433018 提到...: #include<iostream>
#include<cstdlib>
#include<random>
#include<ctime>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> x(70, 10);
int a[1000];
double s = 0;
for (int i = 0; i < 1000; i++){
a[i] = x(gen);
cout << a[i] << "\t";
s = a[i]+s;
if (i % 10 == 9)cout << endl;
}
cout << (clock() - seed) / 10000.0 << "sec.\n";
double av = s / 1000.0;

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] - av)*(a[i] - av);

}
double var = sum2 / 1000.0;
double c = sqrt(var);
cout << c << "標準差";
cout << endl;
system("Pause");
return 0;
}; 2016年10月14日下午4:33
B10133186 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> dis(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = dis(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum/1000.0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]- av*av);
}
double var = sum2 / 1000.0;
cout << sum / 1000.0 << endl;
double s = sqrt(var);
cout << s << endl;
cout << (clock() - seed) / 1000.0 << "sec.\n";
cout << endl;
system("Pause");
return 0;
}; 2016年10月14日下午4:34
A10433036 提到...: #include
#include
#include
#include
#include
using namespace std;
int main(){
int seed = clock();
mt19937_64 gen(seed);

normal_distribution x(70, 10);
int a[1000];
double sum = 0;
double s = 0;
double sum2;
for (int i = 0; i < 1000; i++){
a[i] = (int)(round(x(gen)));
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9){
cout << endl;
}
}
sum2 = sum / 1000.0;
for (int i = 0; i < 1000; i++){
s += (a[i] * a[i]) - (sum2*sum2);
}
s /= 1000;
s = sqrt(s);
cout << sum2;
cout << endl;
cout << s;
cout << endl;
cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");
return (0);
}; 2016年10月14日下午4:44
b10233073 楊博宇提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:44
b10233096金綱儒提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:45
b10233102 羅時宇提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:45
B10433092 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double>X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 100; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");
return 0;
}; 2016年10月14日下午4:54
A10433024 提到...: #include <iostream>
#include<cstdlib>
#include<random>
#include<ctime>
#include<cmath>
using namespace std;
int main(){
int seed = clock();
mt19937_64 gen(seed);

normal_distribution<double> x(70, 10);
int a[1000];
double sum = 0;
double s = 0;
double sum2;
for (int i = 0; i < 1000; i++){
a[i] = (int)(round(x(gen)));
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9){
cout << endl;
}
}
sum2 = sum / 1000.0;
for (int i = 0; i < 1000; i++){
s += (a[i] * a[i]) - (sum2*sum2);
}
s /= 1000;
s = sqrt(s);
cout << sum2;
cout << endl;
cout << s;
cout << endl;
cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");
return (0);
}; 2016年10月14日下午4:57
b10233109 宋昱璋提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:57
B10533065 提到...: #include <iostream> //程式如果用到cout或cin就必須引用iostream
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;

int main(void) {
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> dis(70, 10);
int a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = (int)(round(dis(gen)));
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << "\n";

cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");

return 0;
}; 2016年10月14日下午4:59
B10233108 林宣瑋提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午4:59
B10433080 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double>X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 100; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";
system("Pause");
return 0;
}; 2016年10月14日下午5:01
B10233082 唐偉強提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:01
B10433011 提到...: #include
#include
#include
#include
#include
using namespace std;
int main(){
int seed = clock();
mt19937_64 gen(seed);
normal_distributionX(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2+=(a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:07
B10433103 提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;

int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> dis(70, 10);
double a[100];
double sum = 0;
for (int i = 0; i < 100; i++){
a[i] = (int)(round(dis(gen)));
cout << a[i] << "\t";
sum+= a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 100.0;
cout <<"average= "<< av << "\n";

double sum2 = 0;
for (int i = 0; i < 100; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 100.0;
double s = sqrt(var);
cout <<"standard deviation= "<< s << endl;
cout << (clock()-seed/100.0)<<"sec. \n";
system("pause");
return 0;
}; 2016年10月14日下午5:07
B10233077古承翰提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:19
匿名提到...: B10233139 陳鈺璇

#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:21
B10233074許逸憲提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:21
B10233087黃少洋提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:22
匿名提到...: b10233137
#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:22
匿名提到...: B10233169

#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:23
匿名提到...: B10233139

#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:23
B10233169 提到...: B10233169

#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9) cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月14日下午5:26
B10233127李昆和提到...: #include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <cmath>
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution<double> X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月17日晚上9:32
B10333022李昕翰提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年10月18日晚上9:27
B10333022李昕翰提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年10月18日晚上9:27
B10233095 提到...: #include
#include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];
if (i % 10 == 9)cout << endl;
}
double av = sum / 1000.0;
cout << av << "\n";

double sum2 = 0;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i] - av*av);
}
double var = sum2 / 1000.0;
double s = sqrt(var);
cout << s << endl;

cout << (clock() - seed) / 1000.0 << "sec.\n";

system("Pause");
return 0;
}; 2016年10月19日晚上10:57
B10333054 提到...: ImageMatrix convert2green(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 1] = G;
}
return mm;
}
ImageMatrix convert2red(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];

mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 1] = 0;
mm.term[y*m.rowsize + x +2] = G;
}
return mm;
}
ImageMatrix convert2blue(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x +1] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 0] =G;
}
return mm;
}
ImageMatrix convert2half(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y<m.height; y++)
for (int x = 0; x<m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
BYTE gray = (BYTE)(0.2989*R + 0.5870*G + 0.1140*B + 0.5);
if (y<m.height/2)
mm.term[y*m.rowsize + x] = mm.term[y*m.rowsize + x + 1] =
mm.term[y*m.rowsize + x + 2] = gray;
else{
mm.term[y*m.rowsize + x + 0] = B;
mm.term[y*m.rowsize + x + 1] = G;
mm.term[y*m.rowsize + x + 2] = R;
}
}
return mm;
}; 2016年11月25日下午5:10
B10333016 提到...: ImageMatrix convert2green(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 1] = G;
}
return mm;
}
ImageMatrix convert2red(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];

mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 1] = 0;
mm.term[y*m.rowsize + x + 2] = G;
}
return mm;
}
ImageMatrix convert2blue(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x + 1] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 0] = G;
}
return mm;
}
ImageMatrix convert2half(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y<m.height; y++)
for (int x = 0; x<m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
BYTE gray = (BYTE)(0.2989*R + 0.5870*G + 0.1140*B + 0.5);
if (y<m.height / 2)
mm.term[y*m.rowsize + x] = mm.term[y*m.rowsize + x + 1] =
mm.term[y*m.rowsize + x + 2] = gray;
else{
mm.term[y*m.rowsize + x + 0] = B;
mm.term[y*m.rowsize + x + 1] = G;
mm.term[y*m.rowsize + x + 2] = R;
}
}
return mm;
}; 2016年11月25日下午5:11
B10233082 唐偉強提到...: #include
#include
#include
#include
using namespace std;
int main()
{
int seed = clock();
mt19937_64 gen(seed);
normal_distribution X(70, 10);
double a[1000];
double sum = 0;
double sum2 = 0;
for (int i = 0; i < 1000; i++){
a[i] = X(gen);
cout << a[i] << "\t";
sum += a[i];

if (i % 10 == 9)cout << endl;
}
sum = sum / 1000.0;
cout << "平均數:" << sum << endl;
for (int i = 0; i < 1000; i++){
sum2 += (a[i] * a[i]) - (sum * sum);
}
sum2 = sum2 / 1000;
double s = sqrt(sum2);
cout << "標準差:" << s << endl;
cout << (clock()-seed)/1000.0 <<"sec." << endl;
system("Pause");
return 0;
}; 2016年12月16日下午5:20
B10233077 提到...: ImageMatrix convert2green(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 1] = G;
}
return mm;
}
ImageMatrix convert2red(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];

mm.term[y*m.rowsize + x + 0] = mm.term[y*m.rowsize + x + 1] = 0;
mm.term[y*m.rowsize + x +2] = G;
}
return mm;
}
ImageMatrix convert2blue(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y < m.height; y++)
for (int x = 0; x < m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x + 0];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
mm.term[y*m.rowsize + x +1] = mm.term[y*m.rowsize + x + 2] = 0;
mm.term[y*m.rowsize + x + 0] =G;
}
return mm;
}
ImageMatrix convert2half(ImageMatrix m){
ImageMatrix mm = ImageMatrix(m.height, m.width);
for (int y = 0; y<m.height; y++)
for (int x = 0; x<m.rowsize; x += 3){
BYTE B = m.term[y*m.rowsize + x];
BYTE G = m.term[y*m.rowsize + x + 1];
BYTE R = m.term[y*m.rowsize + x + 2];
BYTE gray = (BYTE)(0.2989*R + 0.5870*G + 0.1140*B + 0.5);
if (y<m.height/2)
mm.term[y*m.rowsize + x] = mm.term[y*m.rowsize + x + 1] =
mm.term[y*m.rowsize + x + 2] = gray;
else{
mm.term[y*m.rowsize + x + 0] = B;
mm.term[y*m.rowsize + x + 1] = G;
mm.term[y*m.rowsize + x + 2] = R;
}
}
return mm;
}; 2016年12月30日下午5:12

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2016年10月14日星期五

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2016年10月14日 星期五

ex6 C++亂數練習

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DengSir7 Google Display

programming

2016年10月14日星期五