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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.    if(n==1)
  8.     return 1;
  9.    else if(n==2)
  10.     return 2;
  11.    else 
  12.    for(i=2;i<n;i++){
  13.    	 a = -2*b + 2*c;
  14.    }
  15.       return a;
  16. }
  17. int main(void) {
  18. 	int n = 3;
  19.     printf("数列anについて, n=%dのときの値は%d\n", n, func(n));
  20. 	return 0;
  21. }
  22.  
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/H1ygEa
language:
C (gcc 8.3)
created:
12 days ago
visibility:
public

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