Question

在我的getline（）读入字符串后，我无法读取整数。我必须从数据文件中读取整个名称，然后读入支付率，然后是家属的数量，然后是总的百分比。我可以使用Arrays循环向量或任何类似的东西。我只能使用getline（）和Ignore（）函数或类似的函数。所以我的问题是我在哪里错了？

以下是数据文件的样子（我只编写了一个人阅读的内容）：

John W. Smith

12.55

3

5
     玛丽安德森

11.75

1

8

Brad W. Baker

11.75

0

0
     希瑟约翰逊

13.25

2

10

到目前为止，这是我的代码：

#include <iostream>
#include <string>
#include <fstream>

using namespace std;


int main()
{
    ifstream indata;
    ofstream outdata;
    string fname, lname;
    int hours;
    hours = 0;
    outdata.open("Weeklypay.dat");
    double payrate;
    double gross;
    double taxes;
    double ssecurity;
    int dependants;
    double retirement;
    double net;
    double percgross;
    int insurance;

    indata.open("Pay.dat");
    getline(indata, fname);

    cout << "Please enter the total hours worked for " << fname << endl;
    cin >> hours;
    indata >> payrate >> insurance;
    gross = payrate * hours;
    taxes = 0.23 * gross;
    ssecurity = 0.08 * gross;
    dependants = 12 * insurance;
    indata >> percgross;
    retirement = percgross * gross / 100;
    net = gross - taxes - ssecurity - dependants - retirement;

    cout << fname << "'s net pay is: $" << net << endl;
    outdata << fname << endl;
    outdata << "Gross Pay: $" << gross << endl;
    outdata << "Taxes: $" << taxes << endl;
    outdata << "Social Security: $" << ssecurity << endl;
    outdata << "Insurance: $" << dependants << endl;
    outdata << "Retirement: $" << retirement << endl;
    outdata << endl << endl;
    outdata << "Net Pay: $" << net << endl;
    outdata << endl << endl;

    // Next person here:

    cin.ignore(10, '\n');
    getline(indata, fname);

    cout << "Please enter the total hours worked for " << fname << lname << endl;
    cin >> hours;

    indata >> payrate;
    gross = payrate * hours;
    taxes = 0.23 * gross;
    ssecurity = 0.08 * gross;
    indata >> insurance;
    dependants = 12 * insurance;
    indata >> percgross;
    retirement =  percgross * gross / 100;
    net = gross - taxes - ssecurity - dependants - retirement;

    cout << fname << lname << "'s net pay is: $" << net << endl;
    outdata << fname << lname << endl;
    outdata << "Gross Pay: $" << gross << endl;
    outdata << "Taxes: $" << taxes << endl;
    outdata << "Social Security: $" << ssecurity << endl;
    outdata << "Insurance: $" << dependants << endl;
    outdata << "Retirement: $" << retirement << endl;
    outdata << endl << endl;
    outdata << "Net Pay: $" << net << endl;
    outdata << endl << endl;

     indata.close();
     outdata.close();

     return 0;
}

Answer 1

将retirement = percgross * gross;更改为retirement = percgross * gross / 100;您读取了毛的百分比，并将其直接乘以，然后retirement大于gross。
修改
对于多人场景，请使用循环语句。

#include <iostream> #include <string> #include <fstream> using namespace std; int main() { ifstream indata; ofstream outdata; string fname, lname; int hours; hours = 0; outdata.open("Weeklypay.dat"); double payrate; double gross; double taxes; double ssecurity; int dependants; double retirement; double net; double percgross; int insurance; indata.open("Pay.dat"); while(getline(indata, fname) ) { if(fname.empty() ) continue; cout << "Please enter the total hours worked for " << fname << endl; cin >> hours; indata >> payrate >> insurance; gross = payrate * hours; //690.25 taxes = 0.23 * gross;//158.75 ssecurity = 0.08 * gross;//51.7 dependants = 12 * insurance;//3 indata >> percgross; retirement = percgross * gross / 100;//34.51 net = gross - taxes - ssecurity - dependants - retirement; cout << fname << "'s net pay is: $" << net << endl; outdata << fname << endl; outdata << "Gross Pay: $" << gross << endl; outdata << "Taxes: $" << taxes << endl; outdata << "Social Security: $" << ssecurity << endl; outdata << "Insurance: $" << dependants << endl; outdata << "Retirement: $" << retirement << endl; outdata << endl << endl; outdata << "Net Pay: $" << net << endl; outdata << endl << endl; } indata.close(); outdata.close(); return 0; }

当使用getline（）和Ignore（）函数时，似乎无法使我的ifstream和ofstream工作正常工作不能使用循环或数组等

1 个答案: