remove or erase first and last character of string c++

To remove or erase the first and last characters of a string in C++, you can follow these steps:

Declare a string variable: Start by declaring a string variable to store the input string.
Read the input string: Use an appropriate method to read the input string from the user or from a file.
Check if the string is empty: Before removing the first and last characters, you should check if the string is empty. If the string is empty, there are no characters to remove, so you can skip the next steps.
Remove the first character: To remove the first character of the string, you can use the erase() function or the substr() function. The erase() function modifies the original string by removing a specified number of characters from a specified position. In this case, you want to remove only the first character, so you can use str.erase(0, 1);. Alternatively, you can use the substr() function to create a new string that excludes the first character, like this: str = str.substr(1);.
Remove the last character: To remove the last character of the string, you can use similar methods as in step 4. The erase() function can be used to remove the last character by specifying the position and the number of characters to remove. In this case, you want to remove only the last character, so you can use str.erase(str.length() - 1, 1);. Alternatively, you can use the substr() function to create a new string that excludes the last character, like this: str = str.substr(0, str.length() - 1);.
Print or use the modified string: After removing the first and last characters, you can print the modified string or use it for further processing as needed.

Here is an example that demonstrates how to remove the first and last characters of a string in C++:

#include <iostream>
#include <string>

int main() {
    std::string str;
    std::cout << "Enter a string: ";
    std::cin >> str;

    if (!str.empty()) {
        str.erase(0, 1);
        str.erase(str.length() - 1, 1);
        std::cout << "Modified string: " << str << std::endl;
    } else {
        std::cout << "String is empty." << std::endl;
    }

    return 0;
}

This example prompts the user to enter a string, removes the first and last characters using the erase() function, and then prints the modified string. If the input string is empty, it displays a message indicating that the string is empty.