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  1. #include <stdio.h>
  2. int sigma(int n){
  3. //
  4.     if (n == 1){
  5.         return 1;
  6.     }
  7.     else{
  8.         return n+sigma(n-1);
  9.     }
  10. //
  11. }
  12.  
  13. int main(void) {
  14.     int n = 3;
  15.     printf("1から%dまでの和は%d\n", n, sigma(n));
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0.01s 5288KB
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1から3までの和は6
https://ideone.com/6c2YWp
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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