Lecture 133:- Comparing Strings and Checking Palindrome

In C++, you can compare strings for equality and check if a string is a palindrome (reads the same backward as forward). Here's a C++ program that demonstrates how to compare strings and check for a palindrome:

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#include <iostream> #include <string> #include <algorithm> bool areStringsEqual(const std::string& str1, const std::string& str2) {    return str1 == str2; } bool isPalindrome(const std::string& str) {    std::string reversedStr = str;    std::reverse(reversedStr.begin(), reversedStr.end());    return str == reversedStr; } int main() {    std::string str1, str2;        std::cout << "Enter the first string: ";    std::getline(std::cin, str1);    std::cout << "Enter the second string: ";    std::getline(std::cin, str2);    if (areStringsEqual(str1, str2)) {        std::cout << "The two strings are equal." << std::endl;    } else {        std::cout << "The two strings are not equal." << std::endl;    }    if (isPalindrome(str1)) {        std::cout << "The first string is a palindrome." << std::endl;    } else {        std::cout << "The first string is not a palindrome." << std::endl;    }    if (isPalindrome(str2)) {        std::cout << "The second string is a palindrome." << std::endl;    } else {        std::cout << "The second string is not a palindrome." << std::endl;    }    return 0; }

In this program, we define two functions: areStringsEqual and isPalindrome. The areStringsEqual function checks if two strings are equal, and the isPalindrome function checks if a given string is a palindrome by comparing it with its reversed version.

The main() function takes user input for two strings and calls the defined functions to compare the strings for equality and check if they are palindromes.

Sample Input:

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Enter the first string: radar Enter the second string: hello

Sample Output:

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The two strings are not equal. The first string is a palindrome. The second string is not a palindrome.

The program demonstrates how to compare strings and determine if a given string is a palindrome. Note that in this example, the comparison is case-sensitive. If you want a case-insensitive comparison or palindrome check, you can modify the functions accordingly.