Программа должна сохранять данный в файле

#pragma hdrstop
#include <fstream>
#include <conio.h>
#include <string.h>
using namespace std;
#define nl '\n'
//---------------------------------------------------------------------------
 
#pragma argsused
int main(int argc, char* argv[])
{
fstream str("c:\\test.txt",ios_base::in|ios_base::out|ios_base::trunc);
for(int i=0;i<5;i++)
{
char s[100];
cin>>s;
str<<s<<'\n';
};
str.seekp(0);
while(!str.eof())
{
char s[100];
str.getline(s,100,'\n');
cout<<s<<'\n';
};
getch();
str.close();
return 0;
}

#include "stdafx.h"
#include "iostream"
#include "conio.h"
 
 
int _tmain(int argc, _TCHAR* argv[])
{
    int earnings,costs,total_money=0,now,result=0;
    std::cout<<"Please enter your number of money\n";
    std::cout<<"Total money:"; std::cin>>now;
    std::cout<<"Please enter your earnings\n";
    std::cout<<"Earnings:"; std::cin>>earnings;
    std::cout<<"Please enter your number of costs\n";
    std::cout<<"Costs:"; std::cin>>costs;
    total_money=earnings-costs;
    result=total_money+now;
    std::cout<<"Your total money is now:"<<result<<"rub.";
        
    _getch();
    return 0;
}

#include <fstream>
#include <conio.h>
#include <string>
using namespace std;
#define nl '\n'
//---------------------------------------------------------------------------
 
int main(int argc, char* argv[])
{
fstream str("c:\\test.txt",ios_base::in|ios_base::out|ios_base::trunc);
for(int i=0;i<5;i++)
{
char s[100];
cin>>s;
str<<s<<'\n';
};
str.seekp(0);
while(!str.eof())
{
char s[100];
str.getline(s,100,'\n');
cout<<s<<'\n';
};
getch();
str.close();
return 0;
}

#include <iostream>
#include <fstream>
 
int main()
{
   std::ifstream ifs;
   ifs.open("input.txt");
   if(!ifs)
      std::cout<<"Can`t open file\n";
   int total_money, earnings, costs, now, result;
   ifs>>now>>earnings>>costs;
   total_money=earnings-costs;
   result=total_money+now;
   std::ofstream ofs;
   ofs.open("input.txt");
   ofs<<result<<' '<<earnings<<' '<<costs;
   return 0;
}

#include <iostream>
#include <fstream>
 
int main()
{
   std::ifstream ifs;
   ifs.open("temp.txt");
   if(!ifs)
      std::cout<<"Can`t open file\n";
   int total_money, earnings, costs, now, result;
   ifs>>now;
   std::cout<<"Enter your earnings: ";
   std::cin>>earnings;
   std::cout<<"Enter your costs: ";
   std::cin>>costs;
   total_money=earnings-costs;
   result=total_money+now;
   std::cout<<"Your money: "<< now <<'\n';
   std::cout<<"Your costs: "<< costs<< '\n';
   std::cout<<"Your earnings: "<< earnings<< '\n';
   std::cout<<"Now your money: "<< result<< '\n';
   std::ofstream temp;
   temp.open("temp.txt");
   temp<<result;
   std::ofstream ofs;
   ofs.open("input.txt", std::ios::app);
   ofs<<result<<' '<<earnings<<' '<<costs<<'\n';
   return 0;
}