large_factorial.c

#include <stdio.h>

int main() {
    int a[16500], T;
    long long int i, j;

    printf("enter number of the test case: ");
    scanf("%d", &T);

    while (T--) {
        for (i = 0; i < 16500; i++) {
            a[i] = 0;
        }

        a[1] = 1;
        int N, carry = 0; count = 0;
        printf("enter number: ");
        scanf("%d", &N);

        for (i = 1; i <= N; i++) {
            carry = 0;
            for (j = 0; j < 16500; j++) {
                a[j] = a[j] * i + carry;
                carry = a[j] / 10;
                a[j] = a[j] % 10;
            }
        }
        
        for (i = 0; i < 16500; i++) {
            if (a[i] != 0) {
                count = i;
            }
        }
        
        for (i = count; i > 0; i--) {
            printf("%d", a[i]);
        }
        printf("\n");
    }
    return 0;
}