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  1. #include <stdio.h>
  2. //第5回課題2
  3. int c = 0;
  4.  
  5. int rec(int n) {
  6.     c++;
  7.  
  8.     if (n == 1) 
  9.     { return 1; }
  10.     else if (n == 2) 
  11.     { return 2; }
  12.     else 
  13.     { return -6*rec(n-1) - 9*rec(n-2); }
  14. }
  15.  
  16. int main(void) {
  17.     int n = 5;
  18.  
  19.     printf("数列a%dの値は%d\n", n, rec(n));   
  20.     printf("このときrecの呼び出し回数は%d\n", c); 
  21.  
  22.     return 0;
  23. }
  24.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin 
Standard input is empty
stdout 
数列a5の値は-459
このときrecの呼び出し回数は9
https://ideone.com/uxo5f4
プログラミング2 第5回 課題2
language:
C (gcc 8.3)
created:
4 days ago
visibility:
public

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