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  1. #include <stdio.h>
  2.  
  3. //階乗n!
  4. int fact(int n)
  5. {
  6. 	if(n==1)
  7. 		return 1;
  8. 	else
  9. 		return n * fact(n-1);
  10. }
  11.  
  12. int main(void) {
  13. 	int a;
  14.  
  15. 	scanf("%d",&a);
  16. 	printf("%d! = %d",a,fact(a));
  17.  
  18. 	return 0;
  19. }
  20.  
Success #stdin #stdout 0s 5288KB
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stdin
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5
stdout
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5! = 120
https://ideone.com/ShBTbt
[再帰]1からnまでの積、n!階乗
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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