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  1. #include <stdio.h>
  2. //練習問題G
  3.  
  4. int main(void){
  5.    int a, b=2, c=1,n=3;
  6.     int i;
  7.      for(i=3;i<=n;i++){
  8.     	a=b+2*c-2*i;
  9.     	b=a;
  10.     	c=b;
  11.     }
  12.     printf("数列anについて, n=%dのときの値は%d\n", n,a);
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0s 5316KB
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数列anについて, n=3のときの値は-2
https://ideone.com/TRAmWQ
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

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