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  1. #include <stdio.h>
  2.  
  3. int fib(int n){
  4. 	if(n==0) return 0;
  5.  
  6. 	else if(n==1)return 1;
  7. 	else fib(n-1)+fib(n-2);
  8. }
  9.  
  10. int main(void) {
  11. 	int n;
  12. 	scanf("%d",&n);
  13.  
  14. 	if(n<0){
  15. 	printf("0以上の整数を入力してください");
  16. 	return 1;}
  17.  
  18. 	printf("%d",fib(n));
  19.  
  20.  
  21.  
  22. 	return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/vBSARZ
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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