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  1. #include <stdio.h>
  2.  
  3. int add(int a); //function declaration
  4.  
  5. int main (void)
  6. {
  7.     int b,sum;
  8.  
  9.     printf("\nEnter a number: ");
  10.     scanf("%d", &b);
  11.  
  12.     sum = add(b); //function calling
  13.  
  14.     printf("\nSum: %d\n\n", sum);
  15.  
  16.     return 1;
  17. }
  18.  
  19. int add(int a) //function definition    
  20. {
  21.     int result = 0;
  22.     for(int i = 0; i < a; i++)
  23.     {
  24.         result = result + i;
  25.     }
  26.  
  27.     return result;
  28. }
Runtime error #stdin #stdout 0s 9432KB
comments (?)
stdin 
10
stdout 
Enter a number: 
Sum: 45
https://ideone.com/6BjM6y
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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