/*
   testrep4.cpp
   CIS 150
   6/10/2008
   David Klick
  
   Demonstration of accumulator (for sum).
*/

#include <iostream>
using std::cin;
using std::cout;

void cont();

int main() {
   int ctr;   // loop counter
   int sum;   // accumulator
    
   // add up all the numbers from 1 to 10 using for
   sum = 0;
   for (ctr=1; ctr<=10; ctr++) {
      sum += ctr;
   }
   cout << "The sum of 1 through 10 is " << sum << '\n';
   
   // add up all the numbers from 1 to 10 using while
   sum = 0;
   ctr = 1;
   while (ctr<=10) {
      sum += ctr;
      ctr++;
   }
   cout << "The sum of 1 through 10 is " << sum << '\n';

   // add up all the numbers from 1 to 10 using do/while
   sum = 0;
   ctr = 1;
   do {
      sum += ctr;
      ctr++;
   } while (ctr <= 10);
   cout << "The sum of 1 through 10 is " << sum << '\n';

   cont();
   return 0;
}

void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:

   The sum of 1 through 10 is 55
   The sum of 1 through 10 is 55
   The sum of 1 through 10 is 55   
*/