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  1. //Nathan Dominguez                 CSC5                	 Chapter 5, P. 294, #1 
  2. //
  3.  
  4. /*******************************************************************************
  5.  * 
  6.  * Calculate the Sum of Numbers
  7.  * _____________________________________________________________________________
  8.  * This prorgam will take an input positive number and will loop to get the sum
  9.  * of all the numbers from 1 up to the input number. The program will not 
  10.  * accept negative numbers that are input.
  11.  * _____________________________________________________________________________
  12.  * INPUT
  13.  *     number : the number entered 
  14.  * 
  15.  * OUTPUT 
  16.  *     sum : the summation of all numbers stored   
  17.  * FORMULA    
  18.  *     sum = sum + number
  19.  ******************************************************************************/
  20. #include <iostream> 
  21. #include <iomanip> 
  22. using namespace std;
  23. int main ()
  24. {
  25.  
  26. 	int sum = 0;            //OUTPUT-total of all numbers from 1 to number
  27. 	int number;            //INPUT-the number that was chosen
  28.  
  29.     // display message
  30.     // input number
  31. 	cout << "Enter a number greater than 0." << endl;  
  32. 	cin >> number;                                     
  33.  
  34. 	for (int counter = 1; counter <= number; counter++)
  35. 	// counter goes up by 1 
  36. 	// calculates sum
  37. 	{	                                               
  38. 		sum = sum + counter;
  39. 		// counter++;
  40. 	}
  41.  
  42. 	    if (number < 1)
  43. 	{       // display "invalid" message
  44. 			cout << number << " is an invalid input." << endl;
  45. 	}
  46. 	else
  47.     // display output message
  48. 	cout << "The sum of numbers 1 through " << number
  49. 	     << " " << "is " << sum << "." << endl;        
  50. 	return 0;
  51. 	}
Success #stdin #stdout 0.01s 5300KB
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Enter a number greater than 0.
The sum of numbers 1 through 7 is 28.
https://ideone.com/ggYsLo
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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