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  1. #include <stdio.h>
  2. int trb(int n){
  3.      if (n==0||n==1){
  4.        return 0;
  5.     }
  6.      if (n==2){
  7.          return 1;
  8.    }
  9.  
  10.  else return trb(n-1)+trb(n-2)+trb(n-3);
  11. }
  12.  
  13. int main(void) {
  14.   int n;
  15.  scanf("%d",&n);
  16.  int result =trb(n);
  17.  printf("第%d項の値は%dです。",n,result);
  18. 	// your code goes here
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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7
stdout
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第7項の値は13です。
https://ideone.com/50jntm
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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