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  1. #include <stdio.h>
  2. int sigma(int n){
  3.     if (n == 1){
  4.         return 1;
  5.     }
  6.     else{
  7.         return n + sigma(n-1);
  8.     }
  9. }
  10.  
  11. int main(void) {
  12.     int n = 4;
  13.     printf("1から%dまでの和は%d\n", n, sigma(n));
  14. 	return 0;
  15. }
  16.  
Success #stdin #stdout 0s 5284KB
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1から4までの和は10
https://ideone.com/c1f14f
language:
C (gcc 8.3)
created:
80 days ago
visibility:
public

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