5.5 C++ How to Program (8th Edition) By Paul Deitel, Harvey Deitel

(Summing Integers) Write a program that uses a for statement to sum a sequence of integers. Assume that the first integer read specifies the number of values remaining to be entered. Your program should read only one value per input statement. 

A typical input sequence might be 5 100 200 300 400 500 where the 5 indicates that the subsequent 5 values are to be summed.

Solution:

#include < iostream>
 
using namespace std;
 
int x;
int sum = 0;
 
int main()
{
  cout << "Enter the numbers. First integer read specifies" << endl
       << "the number of values remaining to be entered.\n";
  cin >> x;
 
  for(int a = 1, number; a <= x; a++){
     cin >> number;
    sum += number;
  }
   cout << "The sum of integers: " << sum << endl;
 
   //for pause
   system("PAUSE");
   return 0;
}