2Copy.c

/* implementing strcmp using dynamic memory allocation in C */
/* Author : Kautuk Raj */
#include <stdio.h>
#include <stdlib.h>
void my_strcat(); // function prototype

void my_strcat()
{
    int i = 0, flag = 0;
    char* p1 = (char*)malloc(255 * sizeof(char)); /* allocating char pointer of size 255 to implement string */
    char* p2 = (char*)malloc(255 * sizeof(char));
    scanf("%[^' '] %s", p1, p2);
    while (*(p1 + i) != '\0' || *(p2 + i) != '\0') /* till we reach the end of the string */
    {
        if (*(p1 + i) != *(p2 + i)) /* checking if each char position element is equal or not */
        {
            flag = 1;
            break;
        }
        i++;
    }
    printf("%d\n", flag);
    free(p1); /* freeing up the memory space allocated */
    free(p2);
}

int main()
{
    my_strcat(); // calling the function
    return 0;
}