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

Short Answer

Expert verified
Answer: The header file that should be included is `string.h`.

Step by step solution

01

Identify the header file for string functions

To use string functions like strlen and strcpy in a C program, we need to include the header file `string.h`. This header file provides various functions to perform string manipulation tasks.
02

Include the header file in the program

In a C program where we want to use string functions, we must include the header file `string.h` at the beginning of the program using the `#include` preprocessor directive: ```c #include ``` After this, we can use string functions such as strlen and strcpy in our program.

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