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  1. //練習問題A(再帰なし),練習問題B
  2. #include <stdio.h>
  3. //a{n+1}=-2a{n}+4,a{0}=2
  4. int main(void){
  5. 	int n,an=2;
  6. 	scanf("%d",&n);
  7. 	for(int i=0;i<n;i++){
  8. 		an=-2*an+4;
  9. 	}
  10. 	printf("数列a%dの値は%d\n",n,an);
  11.  
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0.01s 5276KB
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5
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数列a5の値は-20
https://ideone.com/06Ldfe
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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