fork download
copy 
  1. //Andres Guzman CSC5 Chapter 5, P. 294, #1
  2. //
  3. /*******************************************************************************
  4. *
  5. * DISPLAY SUM OF NUMBER
  6. * ______________________________________________________________________________
  7. * This program will display a sum of integers after a inputted integers
  8. *
  9. * Computation is based on the formula:
  10. *
  11. * Input Validation: num <= 0
  12. *
  13. * total += sum, sum++
  14. * ______________________________________________________________________________
  15. * INPUT
  16. *
  17. * num = The inputed integer by the programmer
  18. *
  19. * OUTPUT
  20. *
  21. * sum = All the integers prior to the input.
  22. * total = The added sums 
  23. *
  24. *******************************************************************************/
  25. #include <iostream>
  26. using namespace std;
  27. int main ()
  28. {
  29. 	int num;	 // Holds the input integer
  30. 	int sum = 1; // counter starting from the first positive number
  31. 	int total = 0;	//Accumulates the added total of sum
  32.  
  33. //
  34. //Display input prompt
  35. 		cout << "Enter a positive integer value: ";
  36. 		cin >> num;
  37. //
  38. //Initalize While Loop & nested While Loop
  39. 		while (num <= 0)	//if the number is 0 or less, displays invalid.
  40. 		{
  41. 			cout << "\nInvalid value, please enter a positive integer value.\n";
  42. 			cout << "\nEnter a positive integer value: ";
  43. 			cin >> num;
  44. 		}
  45. 		while (sum <= num) //Sum will loop until it reachs the inputed integer
  46. 		{
  47. 		total += sum;	  //Adds up the sums into total for a final number
  48. 		sum++;
  49. 		}
  50. //
  51. //Output results
  52. 	cout << "\nSum: " << total;	//Outputs the sum of all the numbers up to the 
  53. 								//integer added
  54. }
Success #stdin #stdout 0s 5276KB
comments (?)
stdin
copy 
50
stdout
copy 
Enter a positive integer value: 
Sum: 1275
https://ideone.com/MBMnSK
Chapter 5 #1
language:
C++ (gcc 8.3)
created:
18 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!