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  1. //Andrew Alspaugh                 CS1A               CHAPTER 5. P. 294 #1
  2. //
  3. /***************************************************************************
  4.  * Compute Sum of Numbers
  5.  * ________________________________________________________________________
  6.  * The purpose of this program is to compute the sum of integer values between 1
  7.  * and the entered value
  8.  *_________________________________________________________________________
  9.  * INPUT:
  10.  *      INTEGER
  11.  * OUTPUT:
  12.  *      sum
  13.  **************************************************************************/
  14. #include <iostream>
  15. using namespace std;
  16.  
  17. int main() 
  18. {
  19. 	//INPUT WITH VALIDATION
  20. 	int INTEGER;
  21.  
  22.     cout << "Enter a positive integer" << endl;
  23.     cin >> INTEGER; 
  24.     cout << "You entered: " << INTEGER << endl;
  25.     while (INTEGER <= 0)
  26.     {
  27.     	cout << "Error: Enter Integer greater than 0:" << endl;
  28.     	cin >> INTEGER;
  29.     	cout << "You Entered: " << INTEGER << endl;
  30.     }
  31.  
  32.     //CALCULATE SUM OF NUMBERS
  33.     int sum = 0;
  34.     int num = 1;
  35.  
  36.     do
  37.     {
  38.          sum += num;
  39.          num++;
  40.     }
  41.     while (num <=INTEGER);
  42.  
  43.     //DISPLAY SUM OF INTEGERS
  44.     cout << "Sum of Integers is: " << sum << endl;
  45.  
  46.  
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 5324KB
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stdin
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0
50
stdout
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Enter a positive integer
You entered: 0
Error: Enter Integer greater than 0:
You Entered: 50
Sum of Integers is: 1275
https://ideone.com/NEvj6X
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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