ex02_05.cpp

《c＋＋大学教程》源码

// Ex. 2.5: ex02_05.cpp
// Calculate the sum of the integers from 1 to 10.
#include <iostream>

using std::cout;
using std::endl;

// function main begins program execution
int main()
{
   int sum;              // stores sum of integers 1 to 10
   int x;                // counter

   x = 1;                // count from 1
   sum = 0;              // initialize sum

   while ( x <= 10 ) { 
      sum += x;          // add x to sum
      ++x;               // increment x

   } // end while

   cout << "The sum is: " << sum << endl;

   return 0;  // indicate successful termination

} // end function main


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