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  1. #include <stdio.h>
  2. //a{n+1} = -2a{n} + 4, a{0}=2(再帰あり版)
  3. int rec(int n){
  4. 	if(n == 0){
  5. 		return 2;
  6. 	}
  7. 	else {
  8. 		return -2*rec(n-1)+4;
  9. 	}
  10. }
  11. int main(void) {
  12.     int n;
  13.     scanf("%d",&n);
  14.     printf("数列a%dの値は%d\n", n, rec(n));
  15.    	return 0;
  16. }
Success #stdin #stdout 0s 5288KB
comments (?)
stdin 
1
stdout 
数列a1の値は0
https://ideone.com/ZDIY4Y
language:
C (gcc 8.3)
created:
72 days ago
visibility:
public

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