#include <stdio.h>

int main(void)
{
 int fac=0;
 
 printf("숫자하나를 입력하세요 = ");
 scanf("%d", &fac);

 for(int sum = 0; fac>0; fac--)
 {
  sum*=fac;
 }
 printf("입력하신 수의 팩토리얼은 = %d입니다\n", sum);

 return 0;

}



warning C4996: 'scanf': This function or variable may be unsafe. Consider using scanf_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details.
1>        c:\program files\microsoft visual studio 9.0\vc\include\stdio.h(306) : 'scanf' 선언을 참조하십시오.