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  1. #include <stdio.h>
  2. int func(int n){
  3. 	int i,a[30];
  4. 	a[1]=1;
  5. 	a[2]=2;
  6. 	for(i=3;i<=n;i++){
  7. 		a[i]=-2*a[i-1]+2*a[n-2];
  8. 	}
  9. 	return a[n];
  10. }
  11. int main(void) {
  12. 	// your code goes here
  13. 	int n=3;
  14. 	printf("数列anについて、n=%dの時%d",n,func(n));
  15. 	return 0;
  16. }
  17.  
Success #stdin #stdout 0.01s 5260KB
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Standard input is empty
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数列anについて、n=3の時-2
https://ideone.com/TXe42q
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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