fork download 
  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(n){
  4. 	if(n==0)
  5. 		return 0;
  6. 	else if(n==1)
  7. 		return 0;
  8. 	else if(n==2)
  9. 		return 1;
  10. 	else
  11. 		return tri(n-1)+tri(n-2)+tri(n-3);
  12. }
  13.  
  14. int main(void) {
  15. 	int n = 7;
  16.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  17. 	return 0;
  18. }
  19.  
  20.  
Success #stdin #stdout 0s 5316KB
comments (?)
stdin 
Standard input is empty
stdout 
数列Tnについて, n=7のときの値は13
https://ideone.com/yuW0rS
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!