ex3_10.cpp

来自「Visual C++ 2005的源代码」· C++ 代码 · 共 37 行

// Ex3_10.cpp
// Using an infinite for loop to compute an average
#include <iostream>

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

int main()
{
   double value = 0.0;              // Value entered stored here
   double sum = 0.0;                // Total of values accumulated here
   int i = 0;                       // Count of number of values
   char indicator = 'n';            // Continue or not?

   for(;;)                          // Infinite loop
   {
      cout << endl
           << "Enter a value: ";
      cin >> value;                 // Read a value
      ++i;                          // Increment count
      sum += value;                 // Add current input to total

      cout << endl
           << "Do you want to enter another value (enter n to end)? ";
      cin >> indicator;             // Read indicator
      if ((indicator == 'n') || (indicator == 'N'))
         break;                     // Exit from loop
   }

   cout << endl
        << "The average of the " << i
        << " values you entered is " << sum/i << "."
        << endl;
   return 0;
}