我正在创建一个充当薪资系统的程序,我在其中创建一个文件名并输入:ID(int),pay(double),hours(int)和total wage(double)。我如何将我输入的数据存入文件并将它们放入数组中并显示它们。稍后,我将需要对它们进行排序,因为我在switch语句中有这种情况。
#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
using namespace std;
//Function prototypes
void getEmployeeInfo(int&, double&, int&); //EmployeeInfo prototype
double calcWage(double, int, double&); //calcWage prototype
void printWages(ofstream &, int, double, int , double); //print wages prototype
//Main function
int main(){
int ID, hours, caseInput;
double pay, gross;
char input;
ofstream outputFile;
string filename;
do {
cout << " Menu " << endl;
cout << "1. Calculate gross wages for employees" << endl;
cout << "2. Display employees information to screen" << endl;
cout << "3. Display information in order of ID" << endl;
cout << "4. Display information in order of hourly rate" << endl;
cout << "5. Display information in order of hours worked" << endl;
cout << "6. Display information in order of wage" << endl;
cout << "7. Quit the system" << endl;
cout << "Enter your option --> ";
cin >> caseInput;
switch (caseInput) {
case 1: //Create file
cout << "Enter the filename: ";
cin >> filename;
//open file
outputFile.open(filename.c_str());
outputFile << setw(10) << "ID" << setw (15) << "Pay" << setw(17) << "Hours"
<< setw(11) << "Gross"<<endl;
outputFile << "---------------------------------------------------------\n";
do{
getEmployeeInfo(ID, pay, hours);
calcWage(pay, hours, gross);
printWages(outputFile, ID, pay, hours, gross);
cout << "Do you want to enter another employee's information? ";
cin >> input;
}
while(input == 'y' || input == 'Y');
//If user does not enter y, close file
outputFile.close();
cout << "The result is reported to the file " <<
filename << "." << endl;
break;
case 2:
break;
case 3:
break;
case 4:
break;
case 5: cout << "Thank you for using Math Tutor." << endl;
break;
case 6: cout << "Thank you for using Math Tutor." << endl;
break;
case 7: cout << "Thank you for using the Payroll System." << endl;
break;
default: cout << "Error. Enter a number 1-7." << endl;
}
}
while(caseInput != 7);
return 0;
}
//Function to input employee info
void getEmployeeInfo(int &ID, double &pay, int &hours){
cout << "Enter an employee's information by the order of ID number, rate, hours: ";
cin >> ID >> pay >> hours;
while(ID < 0){
cout << "You must enter a non negative value. Try again!" << endl;
cin >> ID;
}
while(pay < 0){
cout << "You must enter a non negative value. Try again!" << endl;
cin >> pay;
}
while(hours < 0){
cout << "You must enter a non negative value. Try again!" << endl;
cin >> hours;
}
}
//Function calculates gross pay
double calcWage(double pay, int hours, double &gross){
gross = pay * hours;
return gross;
}
//Print function
void printWages(ofstream &outputFile, int ID, double pay, int hours, double gross){
outputFile << setw(10)<< ID << setw(12) << "$" << setprecision(2)
<< fixed << pay << setw(13) << hours
<< setw(10) << "$" << fixed << gross << endl;
}
答案 0 :(得分:0)
ifstream input("filename.txt");
copy(istreambuf_iterator<char>(input), istreambuf_iterator<char>(), ostreambuf_iterator<char>(cout));
此代码将从txt文件中读取数据并将其打印到屏幕。您可以参考cppreference.com查看所有组件的工作原理。
确保包含相应的标题。该参考文献也会告诉你。
答案 1 :(得分:0)
我认为您可以将数据存储在New类中,并首先将这些数据保存在vecotr中。像这样:
// declare a class with all your employee info in.
class Info
{
public:
Info(int id, int hours, double pay)
{
this.ID = id;
this.hours = hours;
this.pay = pay;
this.gross = pay*hours;
}
int ID;
int hours;
double pay;
double gross;
}
vector<Info> vInfo; // save your data from your input or file
// if you want to sort your data
std::sort(vInfo.begin(), vInfo.end(), [ ](Info &a, Info &b){
// you can change this depend on your order
// return a.xxx < b.xxxx
return a.ID < b.ID;
});
// then use the printWagesVec to print the data in your case 2,3,4,5,6
// change print function
int printWagesVec(vector<Info>& vInfo)
{
cout << setw(10) << "ID" << setw (15) << "Pay" << setw(17) << "Hours"
<< setw(11) << "Gross"<<endl;
cout << "---------------------------------------------------------\n";
vector<Info>::iterator it = vInfo.begin();
for(; it != vInfo.end(); it++)
{
cout << setw(10)<< it->ID << setw(12) << "$" << setprecision(2)
<< fixed << it->pay << setw(13) << it->hours
<< setw(10) << "$" << fixed << it->gross << endl;
}
return 0;
}