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  1. #include <stdio.h>
  2. //練習問題D
  3.  
  4. int func(int n) {
  5.     if (n == 0) {
  6.         return -1;  // a0 = -1
  7.     } else {
  8.         return 3 * func(n - 1) + 5;  // an = 3*a_{n-1} + 5
  9.     }
  10. }
  11.  
  12. int main(void) {
  13.     int n = 3, m;
  14.     m = func(n);
  15.     printf("数列anについて, n=%dのときの値は%d\n", n, m);
  16.     return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5324KB
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数列anについて, n=3のときの値は38
https://ideone.com/XvZow1
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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