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  1. #include <stdio.h>
  2.  
  3. int sumodd(int n){
  4. 	if(n<=0){
  5. 		return 0;
  6. 	}
  7. 	else if(n%2!=0){
  8. 		return n+sumodd(n-1);
  9. 	}
  10. 	else {
  11. 		return sumodd(n-1);
  12. 	}
  13. }
  14. int main(){
  15. 	int n;
  16. 	scanf("%d",&n);
  17.  
  18. 	if(n > 0){
  19. 		int result = sumodd(n);
  20. 		printf("1から%dまでの奇数の和は%d",n,result);
  21. 	}return 0;
  22. }
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
52
stdout 
1から52までの奇数の和は676
https://ideone.com/fPYFHO
language:
C (gcc 8.3)
created:
11 days ago
visibility:
public

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