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  1. // Drew Duffey			CSC5			Chapter 5, P.294, #1
  2. // 
  3. /*******************************************************************************
  4.  * 
  5.  * CALCULATE SUM
  6.  * _____________________________________________________________________________
  7.  * This program will calculate the sum of all numbers up to a specific positive
  8.  * number, also known as a termial.
  9.  * _____________________________________________________________________________
  10.  * INPUT
  11.  * number	: The number the user wants to find the termial of
  12.  * 
  13.  * OUTPUT
  14.  * sum		: The sum of all the positive numbers below and including the number
  15.  * 
  16. *******************************************************************************/
  17. #include <iostream>
  18. #include <iomanip>
  19. using namespace std;
  20. int main ()
  21. {
  22. 	int number; //INPUT - The number the user wants to find the terminal value 
  23. 				//of
  24. 	float sum; //OUTPUT - The sum of all the positive numbers below and 
  25. 			   //including the number
  26.  
  27. 	//Prompt the user to input a positive number, giving an error if the number
  28. 	//is negative.
  29. 	cout << "Please enter a positive whole integer: ";
  30. 	cin >> number;
  31.  
  32. 	//Input Validation
  33. 	if (number < 0)
  34. 	{
  35. 		cout << "\nInvalid number. Please try again.";
  36. 		return 0;
  37. 	}
  38.  
  39. 	//Calculate sum
  40. 	sum = (number*(number+1))/2;
  41. 	cout << "\nThe termial of that number is " << sum;
  42.  
  43. return 0;	
  44. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
72
stdout 
Please enter a positive whole integer: 
The termial of that number is 2628
https://ideone.com/bPrL99
language:
C++ (gcc 8.3)
created:
15 days ago
visibility:
secret

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