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2016年10月28日 星期五

Ex8 C++檔案讀寫與operator overloading

定義student class





運算子多載處理輸出


字串分割、字串轉換與運算子多載處理輸入




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16 則留言:

  1. b102331272016年10月28日 下午5:06

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  2. B101331862016年10月28日 下午5:07

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    double av;
    student(){};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w; av = (y + z + w) / 3.0;
    }
    };
    ostream& operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.av << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream& operator >>(istream& ff, student& X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  3. B10233082 唐偉強2016年10月28日 下午5:07

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  4. b102331372016年10月28日 下午5:13

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  5. b102331692016年10月28日 下午5:13

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  6. b102331392016年10月28日 下午5:13

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  7. A104330152016年10月28日 下午5:16

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;

    class student
    {
    public:
    string name;
    int math;
    int java;
    int OS;
    float san;

    student(){};
    student(string x, int y, int z, int w,float c){
    name = x; math = y; java = z; OS = w;
    san = c;
    }

    };

    ostream&operator<<(ostream&ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS <<"," <<X.san<<endl;
    return ff;

    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1)
    {
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream& operator>>(istream&ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    float san = (math + java + OS) / 3.0;
    X = student(name, math, java, OS,san);

    return ff;

    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    float san;
    do
    {
    student X;
    f_in >> X;
    f_out << X;
    cout << X;

    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  8. B104330922016年10月28日 下午5:32

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include<string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    int XO;
    student(){};
    student(string x, int y, int z, int w){

    name = x; math = y; java = z; OS = w;
    XO = (math + java + OS) / 3.0;
    }

    };
    ostream& operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.XO << endl;
    return ff;
    };
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    };
    istream& operator >> (istream& ff, student& X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];

    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    X = student(name, math, java, OS);
    return ff;
    };

    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  9. B104330802016年10月28日 下午5:32

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    int OX;


    student(){};
    student(string x, int y, int z, int w){

    name = x; math = y; java = z; OS = w;
    OX = (math + java + OS) / 3.0;
    }






    };
    ostream& operator<<(ostream&ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << ","<<X.OX<<endl;
    return ff;
    };
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;

    }
    a[i] = tmp.substr(start, tmp.length() - start);
    };
    istream& operator >>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    X = student(name, math, java, OS);
    return ff;
    };
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;

    } while (!f_in.eof());
    f_in.close();

    system("Pause");
    return 0;


    }

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  10. B103330162016年10月28日 下午5:39

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;

    class student{
    public:
    string name;
    int math;
    int java;
    int OS;
    int avg;
    student(){};
    student(string x, int y, int z, int w ,int t){
    name = x; math = y; java = z; OS = w; avg = t;
    }
    };

    ostream& operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS <<","<<X.avg<<endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream& operator >>(istream& ff, student& X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int avg = (math + java + OS) / 3.0;
    X = student(name, math, java, OS,avg);
    return ff;
    }

    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout <<X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  11. B103330492016年10月28日 下午5:39

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;

    class student{
    public:
    string name;
    int math;
    int java;
    int OS;
    int avg;
    student(){};
    student(string x, int y, int z, int w ,int t){
    name = x; math = y; java = z; OS = w; avg = t;
    }
    };

    ostream& operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS <<","<<X.avg<<endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream& operator >>(istream& ff, student& X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int avg = (math + java + OS) / 3.0;
    X = student(name, math, java, OS,avg);
    return ff;
    }

    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout <<X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  12. B103330542016年10月28日 下午5:40

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;

    class student{
    public:
    string name;
    int math;
    int java;
    int OS;
    int avg;
    student(){};
    student(string x, int y, int z, int w ,int t){
    name = x; math = y; java = z; OS = w; avg = t;
    }
    };

    ostream& operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS <<","<<X.avg<<endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream& operator >>(istream& ff, student& X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int avg = (math + java + OS) / 3.0;
    X = student(name, math, java, OS,avg);
    return ff;
    }

    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout <<X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  13. B102331082016年12月2日 凌晨2:41

    #include <iostream>
    #include <fstream>
    #include <cstdlib>
    #include <string>
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;
    }

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  14. B10233082 唐偉強2016年12月16日 下午5:21

    #include
    #include
    #include
    #include
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  15. b102330742016年12月30日 下午4:09

    #include
    #include
    #include
    #include
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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  16. B102330772016年12月30日 下午5:09

    #include
    #include
    #include
    #include
    using namespace std;
    class student {
    public:
    string name;
    int math;
    int java;
    int OS;
    student() {};
    student(string x, int y, int z, int w){
    name = x; math = y; java = z; OS = w;
    AVGS();
    }
    double AVGS(){
    return (math + java + OS) / 3.0;
    }
    };

    ostream&operator<<(ostream& ff, student X){
    ff << X.name << ",";
    ff << X.math << "," << X.java << "," << X.OS << "," << X.AVGS() << endl;
    return ff;
    }
    void stringSplitter(string tmp, string a[4]){
    int n;
    int i = 0, start = 0;
    while ((n = tmp.find(",", start)) != -1){
    a[i] = tmp.substr(start, n - start);
    start = n + 1;
    i++;
    }
    a[i] = tmp.substr(start, tmp.length() - start);
    }
    istream&operator>>(istream& ff, student&X){
    string tmp;
    getline(ff, tmp);
    string a[4];
    stringSplitter(tmp, a);
    string name = a[0];
    int math = stoi(a[1]);
    int java = stoi(a[2]);
    int OS = stoi(a[3]);
    int AVG = (math + java + OS) / 3.0;
    X = student(name, math, java, OS);
    return ff;
    }
    int main(){
    ifstream f_in;
    ofstream f_out;
    f_out.open("out.csv", ios::out);
    f_in.open("ez.csv", ios::in);
    string tmp;
    string name;
    int math, java, OS;
    do{
    student X;
    f_in >> X;
    f_out << X;
    cout << X;
    } while (!f_in.eof());
    f_in.close();
    system("Pause");
    return 0;

    }

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