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  1. #include <stdio.h>
  2. //a{n}=2a_{n-1}+3, a{0}=-2(再帰無し版)
  3. int main(void) {
  4.     int n,an;
  5.     n = 4;
  6. 	an=-2;
  7. 	for(int i=0;i<4;i++){
  8. 		an=2*an+3;
  9. 	}
  10.  
  11.     printf("数列anの%d番目の値は%d\n", n, an);
  12. 	return 0;
  13. }
  14.  
Success #stdin #stdout 0s 5280KB
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数列anの4番目の値は13
https://ideone.com/p5g5Eo
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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