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  1. #include <stdio.h>
  2. //練習問題E
  3. int tri(int 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. 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;}
Success #stdin #stdout 0s 5316KB
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数列Tnについてn=7のときの値は13
https://ideone.com/8uQjwu
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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