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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int n){
  4. 	if(n==0)return 0;
  5. 	if(n==1)return 0;
  6. 	if(n==2)return 1;
  7. 	return tri(n-1)+tri(n-2)+tri(n-3);
  8.  
  9. }
  10.  
  11.  
  12.  
  13. int main(void) {
  14. 	int n = 7;
  15.     printf("数列Tnについて, n=%dのときの値は%d\n", n, tri(n));
  16. 	return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5308KB
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Standard input is empty
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数列Tnについて, n=7のときの値は13
https://ideone.com/WsUb7B
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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