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你會用C的算子sizeof?
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C 的continue & break [影片]介紹C++程式for迴圈中加上continue與break的差異之簡例 Java迴圈中的的continue & break
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url="https://www.twse.com.tw/exchangeReport/STOCK_DAY?response=json&date=20220330&stockNo=2330"
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教育部為提昇全民資安素養與電腦防護能力，本部於101年9月5日至11月5日舉辦「全民資安素養自我評量」活動，請在活動期間內踴躍上網檢測資訊安全素養認知程度，並有機會參與抽獎，詳情請參閱活動網站（網址： https://isafe.moe.edu.tw/event
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先說明一下這是後知後覺的解答，所謂後知就是股票價格已知存在陣列(清單)，當然就要用迴圈練習，雙迴圈暴力解需時O(n**2)，當然不用，採python單一迴圈解答「最佳股票的買賣時機#LeetCode 121 Best Time to Buy and Sell Stock」，解...
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RSA 演算 Euler 定理搞定#LeetCode 372 Super Pow--C,C++,Python實作。玩過數論、RSA演算的，解這個問題剛好，C++解答打敗94%，還沒有特別優化。
14 則留言:
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include <iostream>
#include <random>
#include <ctime>
using namespace std;
class person{
double height,weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"weight="<<weight<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person X[30];
mt19937_64 gen(clock());
normal_distribution<double> dis0(163, 7);
normal_distribution<double> dis1(55, 5);
for(int i=0;i<30;i++){
double h=dis0(gen);
double w=dis0(gen);
X[i]=person(h,w);
X[i].print(i);
}
return 0;
}
#include <iostream>
#include <random>
#include <ctime>
using namespace std;
class person{
double height,weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"weight="<<weight<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person X[30];
mt19937_64 gen(clock());
normal_distribution<double> dis0(163, 7);
normal_distribution<double> dis1(55, 5);
for(int i=0;i<30;i++){
double h=dis0(gen);
double w=dis0(gen);
X[i]=person(h,w);
X[i].print(i);
}
return 0;
}
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include
#include
#include
using namespace std;
class person{
double height, weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"height="<<height<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person x[30];
mt19937_64 gen(clock());
normal_distribution<double>dis0(163,7);
normal_distribution<double>dis1(55,5);
for(int i=0;i<30; i++){
double h=dis0(gen);
double w=dis1(gen);
x[i]=person(h,w);
x[i].print(i);
}
}
#include
#include
#include
using namespace std;
class person{
double height, weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"height="<<height<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person x[30];
mt19937_64 gen(clock());
normal_distribution<double>dis0(163,7);
normal_distribution<double>dis1(55,5);
for(int i=0;i<30; i++){
double h=dis0(gen);
double w=dis1(gen);
x[i]=person(h,w);
x[i].print(i);
}
}
#include
#include
#include
using namespace std;
class person{
double height, weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"height="<<height<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person x[30];
mt19937_64 gen(clock());
normal_distribution<double>dis0(163,7);
normal_distribution<double>dis1(55,5);
for(int i=0;i<30; i++){
double h=dis0(gen);
double w=dis1(gen);
x[i]=person(h,w);
x[i].print(i);
}
}
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include
#include
#include
using namespace std;
class person{
double height, weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"height="<<height<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person x[30];
mt19937_64 gen(clock());
normal_distribution<double>dis0(163,7);
normal_distribution<double>dis1(55,5);
for(int i=0;i<30; i++){
double h=dis0(gen);
double w=dis1(gen);
x[i]=person(h,w);
x[i].print(i);
}
}
#include
#include
#include
using namespace std;
class person{
double height, weight;
public:
person(){}
person(double height,double weight){
this->height=height;
this->weight=weight;
}
double bmi(){
return 10000*weight/height/height;
}
void print(int i){
cout<<i<<":\t";
cout<<"height="<<height<<"\t";
cout<<"height="<<height<<"\t";
cout<<"bmi="<<bmi()<<endl;
}
};
int main()
{
person x[30];
mt19937_64 gen(clock());
normal_distribution<double>dis0(163,7);
normal_distribution<double>dis1(55,5);
for(int i=0;i<30; i++){
double h=dis0(gen);
double w=dis1(gen);
x[i]=person(h,w);
x[i].print(i);
}
}
#include
#include
#include
#include
#include
using namespace std;
mt19937 gen;
uniform_real_distribution X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
#include <iostream>
#include <cstdlib>
#include <random>
#include <ctime>
#include <iomanip>
using namespace std;
mt19937 gen;
uniform_real_distribution<double> X;
void gen_matrix( double** a, int m, int n){
// a = new double*[m];
for (int i=0 ; i<m ; i++)
{
a[i] = new double[n];
for (int j=0 ; j<n ; j++)
{
a[i][j]=X(gen);
cout <<setw(15)<<setprecision(10)<<a[i][j];
}
cout<<endl;
}
}
void del_matrix( double** a, int m){
for( int i=0; i<m; i++)
delete [] a[i];
delete [] a;
a=NULL;
cout << "deleted\n";
}
void matrix_mul(double** a, double** b, double** c, int m, int n, int p){
// c = new double*[m];
for (int i=0 ; i<m ; i++)
{
c[i] = new double[n];
for (int j=0 ; j<n; j++)
{
c[i][j]=0;
for(int k=0; k<p; k++)
c[i][j]+=a[i][k]*b[k][j];
cout <<setw(15)<<setprecision(10)<<c[i][j];
}
cout<<endl;
}
}
int main( )
{
gen= mt19937(clock());
X = uniform_real_distribution<double>(0, 10);
double **a=new double*[3], **b=new double*[4];
cout<<"a=\n";
gen_matrix( a, 3, 4);
cout<<"==================\nb=\n";
gen_matrix( b, 4, 3);
cout<<"==================\nc=a*b=\n";
double **c = new double*[3];
matrix_mul(a, b, c, 3, 3, 4);
del_matrix(a, 3);
del_matrix(b, 4);
del_matrix(c, 3);
system("Pause");
return 0;
}
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