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  1. #include <stdio.h>
  2. //a{n+1} = -2a{n} + 4, a{0}=2(再帰なし版)
  3. int main(void) {
  4.     int an=2,i,n = 4;
  5. 	for(i=0;i<n;i++){
  6. 		an = -2*an + 4;
  7. 	}
  8.     printf("数列a%dの値は%d\n", n, an);
  9.  
  10. 	return 0;
  11. }
  12.  
  13.  
Success #stdin #stdout 0.01s 5284KB
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Standard input is empty
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数列a4の値は12
https://ideone.com/ouNkOr
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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