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  1. #include <stdio.h>
  2. //練習問題G
  3.  
  4. int func(int n){
  5.     int a=1,b=2,c=1;
  6.     int i;
  7. if(n==1) return a;  
  8. if(n==2) return b;  
  9.  
  10.     for(i=3;i<=n;i++){
  11.         c=2*a-2*b; 
  12.         a=b;           
  13.         b=c;           
  14.     }
  15.     return c;
  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 0.01s 5320KB
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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/AINSvd
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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