ex02_08.cpp

《c＋＋大学教程》源码

// Ex. 2.8: ex02_08.cpp
// Raise x to the y power. 
#include <iostream>

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

// function main begins program execution
int main()
{
   int x;      // base 
   int y;      // exponent
   int i;      // counts from 1 to y
   int power;  // used to calculate x raised to power y

   i = 1;      // initialize i to begin counting from 1
   power = 1;  // initialize power

   cout << "Enter base as an integer: ";  // prompt for base
   cin >> x;                              // input base

   // prompt for exponent
   cout << "Enter exponent as an integer: ";  
   cin >> y;                              // input exponent

   // count from 1 to y and multiply power by x each time
   while ( i <= y ) {
      power *= x;
      ++i;

   } // end while

   cout << power << endl;  // display result

   return 0;               // indicate successful termination

} // end function main



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