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  1. #include <stdio.h>
  2. //練習問題G
  3.  
  4. int func(int n){
  5.     int a, b=2, c=1;
  6.     int i=1;
  7.     while(i<=n-2){
  8.     	a=-2*b+2*c;
  9.     	i++;
  10.     	c=b;
  11.     	b=a;
  12.     }
  13.     	return a;
  14. }
  15.  
  16. int main(void) {
  17. 	int n = 3;
  18.     printf("数列anについて, n=%dのときの値は%d\n", n, func(n));
  19. 	return 0;
  20. }
  21.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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数列anについて, n=3のときの値は-2
https://ideone.com/e34DxZ
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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