순환/재귀 팩토리알 구현

#include <stdio.h>

int factorial(int x);

int main()

{

    printf("input the number\n");

    int size;

    scanf("%d", &size);

    

    int total = 1;

    for(int i = size; i>1; i--)

        total *= i;

    

    printf("%d recursive factorial is %d \n", size, factorial(size));

    printf("%d iterative factorial is %d \n", size, total);

}

int factorial(int x){

    if (x>1)

        return x * factorial(x-1);

    else return x;

}