Write a program total_cumulatively.cpp to keep a running total of integers it in

Question

Write a program total_cumulatively.cpp to keep a running total of
integers it inputs from a file integers_in.txt, where a 0 ends input. Let
the program output to totals_out.txt. Specifically, if integers_in.txt
contains
20 10 5 3 4 0 15 18
then your program should write
20 : 20
10 : 30
5 : 35
3 : 38
4 : 42


to totals_out.txt. Your program is to include at least two while loops,
one for input and the other for output. Be sure to scope loop counters
and other variables properly. Show that your program works.

Explanation / Answer

please rate - thanks #include <iostream>
#include <fstream>
using namespace std;
int main()
{ifstream in;
ofstream out;
int sum=0,num[50],i=0,j=0;
in.open("integers_in.txt");      
if(in.fail())          
   { cout<<"input file did not open please check it ";
   system("pause");
   return 1;
   }
out.open("totals_out.txt");       
in>>num[i];
while(num[i]!=0&&cin)
   {i++;
    in>>num[i];
   }
while(j<i)
   {sum+=num[j];
   out<<num[j]<<" : "<<sum<<endl;
   j++;
   }  
out.close();
in.close();
system("pause");
return 0;
}

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