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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;
  7.     for(i=3;i<=n;i++){
  8.     	a=-2*b+2*c;
  9.     	c=b;
  10.     	b=a;       }
  11.     	return a;
  12.  
  13. }
  14. int main(void) {
  15. 	int n = 4;
  16.     printf("数列anについて, n=%dのときの値は%d\n", n, func(n));
  17. 	return 0;
  18. }
  19.  
Success #stdin #stdout 0.01s 5316KB
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Standard input is empty
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数列anについて, n=4のときの値は8
https://ideone.com/RW3nsM
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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