c++ length of char*

To find the length of a char* in C++, you can use the strlen() function from the C library. Here are the steps to do this:

1. Include the necessary header file: #include <cstring>. This header file contains the declaration of the strlen() function.

2. Declare a char variable and assign it a string value. For example, char str = "Hello, World!".

3. Call the strlen() function, passing the char* variable as an argument. For example, int length = strlen(str);. This function returns the length of the string excluding the null character '\0' at the end.

4. The variable length will now hold the length of the string.

Here is an example code snippet that demonstrates the above steps:

#include <cstring>

int main() {
    char* str = "Hello, World!";
    int length = strlen(str);

    // Print the length of the string
    std::cout << "Length of the string: " << length << std::endl;

    return 0;
}

This code snippet includes the necessary header file, declares a char* variable str with a string value, calls strlen() to find the length of the string, and then prints the result.