Question

What header file must you include in a program using string functions such as strien and strcpy?

Short answer

Answer: The required header file for using string functions like strlen and strcpy is "string.h".

Step-by-step solution

Identifying the Header File

To use string functions like strlen (to find the length of a string) and strcpy (to copy a string), we need to include the appropriate header file in the program. This ensures that the program has access to the necessary functions from the C Standard Library.

Including the Header File

The correct header file for using string functions such as strlen and strcpy is "string.h". We need to include this file at the beginning of the program using the #include directive. Here is an example of how to include the "string.h" header file in a program: ```c #include int main() { // Your code here } ``` By including "string.h", the program now has access to the various functions required to manipulate strings, including strlen and strcpy.