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  1. #include <stdio.h>
  2.  
  3. int a(int n) {
  4.     if (n == 1) {
  5.         return 1;
  6.     } else {
  7.         return 2 * a(n - 1) + 2;
  8.     }
  9. }
  10.  
  11. int main(void) {
  12.     int n;
  13.     printf("nを入力してください: ");
  14.     scanf("%d", &n);
  15.     printf("a(%d)の値は%d\n", n, a(n));
  16.     return 0;
  17. }
  18.  
Success #stdin #stdout 0s 5292KB
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stdin
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Standard input is empty
stdout
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nを入力してください: a(32765)の値は-2
https://ideone.com/Kw5pT1
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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