How to compare two strings using pointer without strcmp

/*C++/CPP/C program to compare two strings without using  library function strcmp*/

#include<stdio.h>

#include<string.h>

int strCmp(char *p1, char *p2);

int main()

{

char arr1[20];

printf("Enter a String:\n");

scanf("%s",&arr1);

char arr2[20];

printf("Enter a String:\n");

scanf("%s",&arr2);

printf("You entered:%s and %s\n",arr1,arr2);