#include <stdio.h>  
int main(void)  
{  
    char fname[40];  
    char lname[40];  

    printf("Enter your first name: ");  
    scanf("%s", fname);  
    printf("Enter your last name: ");  
    scanf("%s", lname);  
    printf("%s, %s\n", lname, fname);  
    return 0;  
}