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  1. #include <stdio.h>
  2.  
  3. int rec(int n){
  4. 	if (n==0){
  5. 		return 2;
  6.  
  7. 	}
  8. 	else{
  9. 		return -2*rec(n-1)+4;
  10. 	}
  11. }
  12. int main (void){
  13. 	int n=4;
  14. 	printf("%d項目の値は%d",n,rec(n));
  15. 	return 0;
  16. }
  17.  
Success #stdin #stdout 0s 5308KB
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Standard input is empty
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4項目の値は12
https://ideone.com/SUzkfg
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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