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  1. #include <stdio.h>
  2.  
  3. int sumodd(int n) {
  4. 	if(n == 1) {
  5. 		return 1;
  6. 	} else if(n % 2 != 0) {
  7. 		return n + sumodd(n - 2);
  8. 	} else {
  9. 	    return sumodd(n - 1);
  10. 	}
  11. }
  12.  
  13. int main() {
  14. 	int n;
  15. 	scanf("%d", &n);
  16.  
  17. 	printf("1から%dまでの奇数の和は%dです\n", n, sumodd(n));
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 5284KB
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10
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1から10までの奇数の和は25です
https://ideone.com/9g4Uou
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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