C++ 如何将输入到txt文件中的数据存储到数组中？
我正在创建一个作为工资系统的程序，在该程序中我创建一个文件名并输入：ID（整数）、工资（双倍）、工时（整数）和总工资（双倍）。如何将输入的数据放入文件中，并将其放入数组中并显示。稍后，我将需要对它们进行排序，因为我在switch语句中有用于的案例C++ 如何将输入到txt文件中的数据存储到数组中？,c++,arrays,function,sorting,C++,Arrays,Function,Sorting,我正在创建一个作为工资系统的程序，在该程序中我创建一个文件名并输入：ID（整数）、工资（双倍）、工时（整数）和总工资（双倍）。如何将输入的数据放入文件中，并将其放入数组中并显示。稍后，我将需要对它们进行排序，因为我在switch语句中有用于的案例 #include <fstream> #include <iostream> #include <iomanip> #include <string> using namespace std;
#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;
}
#包括
#包括
#包括
#包括
使用名称空间std；
//功能原型
void getEmployeeInfo（int&，double&，int&）//EmployeeInfo原型
双计算年龄（双精度、整数、双精度和）//calcWage原型
无效打印工资（流和，整数，双精度，整数，双精度）//打印工资原型
//主要功能
int main（）{
int ID、小时数、案例输入；
双薪，毛额；
字符输入；
流输出文件；
字符串文件名；
做{
coutifstream输入（“filename.txt”）；
复制（istreambuf_迭代器（输入）、istreambuf_迭代器（）、ostreambuf_迭代器（cout））；
此代码将从txt文件中读取数据并将其打印到屏幕上。您可以参考以了解所有组件的工作方式
确保包含适当的标题。参考文件也会告诉您这一点。我认为您可以将数据存储在一个新类中，然后首先将此数据保存在Vector中。如下所示：
// 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;
}
//声明一个包含所有员工信息的类。
班级信息
{
公众：
信息（整数id，整数小时，双倍支付）
{
this.ID=ID；
这个.小时=小时；
这个。支付=支付；
this.gross=工资*小时；
}
int-ID；
整小时；
双薪；
双倍毛；
}
vector vInfo；//保存输入或文件中的数据
//如果要对数据进行排序
排序（vInfo.begin（），vInfo.end（），[]）（信息与a，信息与b）{
//您可以根据您的订单更改此选项
//返回a.xxxstd:：vector
）来存储数据。
// 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;
}