fork download
copy 
  1. #include <stdio.h>
  2.  
  3. int c;
  4. int rec(int n){
  5. 	c++;
  6.  
  7. 	if(n==1){
  8. 		return 1;
  9. 	}
  10. 	else if(n==2){
  11. 		return 2;
  12. 	}
  13. 	else{
  14. 		return -6*rec(n-1)-9*rec(n-2);
  15. 	}
  16. }
  17.  
  18. int main(void){
  19. 	int n=5;
  20. 	printf("数列a%dの値は%d\n",n,rec(n));
  21. 	printf("この時recの呼び出し回数は%d",c);
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 5328KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
数列a5の値は-459
この時recの呼び出し回数は9
https://ideone.com/XY2ihB
プログラミング２　第５回提出課題２
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!