Comparing Two Strings Using Pointers In C++

In this post, I am going to solve the problem of comparing two strings using pointers In C++.

Examples:

Input: str1 = qwerty, str2 = qwerty
Output: Both are equal

Input: str1 = qwerty, str2 = keypad
Output: Both are not equal
As their length are same but characters are different

The idea is to dereference given pointers, compare values and advance both of them.

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Program Comparing Two Strings Using Pointers In C++

// C++ Program to compare two strings using
// Pointers
#include <iostream>
using namespace std;


// Method to compare two string
// using pointer
bool compare(char *str1, char *str2)
{
	while (*str1 == *str2)
	{
		if (*str1 == '\0' && *str2 == '\0')
			return true;
		str1++;
		str2++;
	}	

	return false;
}

int main()
{
	// Declare and Initialize two strings
	char str1[] = "qwerty";
	char str2[] = "qwerty";

	if (compare(str1, str2) == 1)
		cout << str1 << " " << str2 << " are Equal";
	else
		cout << str1 << " " << str2 << " are not Equal";
}

Output: