#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
 
void *fact(void* t) {
    int i, n = *((int *)t);
    for (i = n; i > 1; i--)
        n = n * (i); 
    printf("factorial of %d = %d\n", *((int *)t), n);
    return NULL;
}
 
int main() {
    pthread_t thread_id;
    int n, ret;
    printf("Enter number: ");
    scanf("%d", &n);
    ret = pthread_create(&thread_id, NULL, &fact, &n); 
    if (ret != 0) {
        perror("Error");
        exit(EXIT_FAILURE);
    }
    pthread_exit(0);
}
 

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