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  1. #include <stdio.h>
  2. void main()
  3. {
  4. 	float fac(int n);
  5. 	int n;
  6. 	float y;
  7. 	printf("input an integer number:");
  8. 	scanf("%d",&n);
  9. 	y=fac(n);
  10. 	printf("%d!=%10.0f\n",n,y);
  11. }
  12. float fac(int n)
  13. {
  14. 	float f;
  15. 	if(n<0)
  16. 	{
  17. 		printf("n<0,dataerror!");
  18. 	}
  19. 	else
  20. 	if(n==0||n==1)
  21. 	f=1;
  22. 	else
  23. 	f=fac(n-1)*n;
  24. 	return(f);
  25. }
  26.  
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
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10
stdout
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input an integer number:10!=   3628800
https://ideone.com/T7Qp5B
language:
C (gcc 8.3)
created:
8 hours ago
visibility:
public

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