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  1. #include <stdio.h>
  2.  
  3. int rec(int n){
  4.     if (n == 1){
  5.         return 1;
  6.     }
  7. 	else if(n==0){
  8. 				return 0;
  9. 	}
  10. 	else if(n/2==0){
  11. 				return n + rec(n - 2);
  12. 	}
  13.     else{
  14.         return n + rec(n - 2);
  15.     }
  16. }
  17. int main(void) {
  18.     int n = 12;
  19.     printf("%d以下の正の偶数/奇数の和は%d\n", n, rec(n));
  20. 	return 0;
  21. }
Success #stdin #stdout 0.01s 5288KB
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Standard input is empty
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12以下の正の偶数/奇数の和は42
https://ideone.com/V13TsI
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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