How to Easily Concatenate ".txt" to a Private Char Array in C ?

Concatenation of Strings in C : Achieving Extension Addition with Ease

In C , concatenating strings involves the combination of two or more strings into a single string. This is a common requirement in programming tasks, such as file handling and string manipulation.

Let's explore a specific scenario where you have a private class variable name of type char[10]. You intend to concatenate the .txt extension to it in order to open a file located in a directory.

To achieve this, you can leverage C 's robust string handling capabilities. Instead of using raw pointers (char*) or fixed-size character arrays (char[N]), it is highly recommended to utilize the standard string class (std::string). This approach offers a plethora of benefits and simplifies string manipulation tasks.

Firstly, define a new std::string variable, say concatenated_name, to store the result. Then, simply concatenate the name and .txt using the operator:

std::string concatenated_name = name + ".txt";

This operation seamlessly combines the two strings and generates a new string concatenated_name. The original name variable remains unmodified. If you need to obtain a char const * string for compatibility reasons, you can convert the std::string using c_str() and specify the length:

const char *c_concatenated_name = concatenated_name.c_str();

By utilizing std::string, you not only simplify string manipulation but also benefit from an array of member functions that provide a range of operations, including concatenation, comparison, and search functionality. Refer to the comprehensive documentation of std::string for further exploration:

• [std::string documentation](https://en.cppreference.com/w/cpp/string/basic_string)

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