Factorial of 100 in c

#include<stdio.h>

#define MAX 10000

void factorialof(int);

void multiply(int);

int length = 0;

int fact[MAX];

int main(){

    int num;

    int i;

    printf("Enter any integer number : ");

    scanf("%d",&num);

   

    fact[0]=1;

    factorialof(num);

   

    printf("Factorial is : ");

    for(i=length;i>=0;i--){

         printf("%d",fact[i]);

    }

    return 0;

}