flag controlled loop eof loop

Question

I am trying to write a C++ program which reads numbers from a file and display their total and maximum on the screen. The program should stop if one or more of the conditions given below become true: 1. The total has exceeded 5555. 2. The end of file has been reached. Note I MUST use both end-of-file and flag control while loops to solve this problem.

SAMPLE INPUT
1000 2500 1500 1100 3300 1200

the output should be 6100 2500

the output i get : 7500 2500

#include<iostream>
#include<fstream>

using namespace std;

int main()
{ 
   ifstream infile;
   ofstream outfile;
   int num;
   int sum=0;
   int max=0;
   bool found=false;

   infile.open("Input.txt");
   outfile.open("output.txt");

   if(!infile)
      cout<<"File Can not open \n";
   else
   {
      infile>>num;
      while(!infile.eof())
      {
         infile>>num;
         while(!found)
         {
            if(num>=max)
               max=num;
            sum+=num;
            if(sum>=5555)
               found=true;

         }
      }
   }
   outfile<<sum<<endl; 
   outfile<<max<<endl; 
   infile.close();
   outfile.close();
}

Answer 1

You have a small problem in your program. The first number being read is not used to compute the sum.

  infile>>num;   // The first number. Read and not used.
  while(!infile.eof())
  {
     infile>>num; // The second number and subsequent numbers.

You can use one while loop instead of two and fix the problem also by using:

  while( sum < 5555 && (infile >> num) )
  {
     if(num>=max)
        max=num;
     sum+=num;
  }

You don't need the found variable either.