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  1. #include <stdio.h>
  2. //a{n} = 2a{n-1} + 3, a{0}=-2(再帰あり版)
  3. int rec(int n){
  4. if(n==0)
  5. {
  6. return -2;
  7. }
  8. else
  9. {
  10. return 2*rec(n-1)+3;
  11. }
  12.  
  13.  
  14.  
  15.  
  16. }
  17.  
  18. int main(void) {
  19.     int n = 4;
  20.     printf("数列anの%d番目の値は%d\n", n, rec(n));
  21. 	return 0;
  22. }
  23.  
  24.  
Success #stdin #stdout 0s 5324KB
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Standard input is empty
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数列anの4番目の値は13
https://ideone.com/PXgkIJ
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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