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  1. #include <stdio.h>
  2. int main(void) {
  3.     int n = 4;
  4.     int a, b = 3, c = 2; 
  5.     for(int i = 3; i <= n; i++){
  6.         a = 2*b + c;
  7.         c=b;
  8.         b=a;
  9.     }
  10.     printf("数列a%dの値は%d\n", n, a);
  11. 	return 0;
  12. }
  13.  
  14.  
Success #stdin #stdout 0s 5304KB
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Standard input is empty
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数列a4の値は19
https://ideone.com/Cb9vVL
language:
C (gcc 8.3)
created:
19 hours ago
visibility:
public

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