Learn and Master C Programming - Using Malloc & Free In Our Code

This video tutorial covers the use of malloc and free in C programming to create a function that combines two strings. It begins with setting up a project in Visual Studio, followed by implementing the function using heap memory. The tutorial explains the differences between heap and stack memory, and demonstrates how to allocate memory using malloc. It also covers methods for copying and concatenating strings, and concludes with testing the function and ensuring proper memory management.

What is the primary purpose of the 'combine strings' function discussed in the lecture?

• To merge two strings into one using heap memory.

• To merge two strings into one using stack memory.

• To convert a string to uppercase.

• To split a string into two separate strings.

Why is it important to use the heap for combining large strings?

• Heap memory is faster than stack memory.

• Heap memory allows dynamic allocation of memory size.

• Heap memory is automatically managed by the system.

• Heap memory is more secure than stack memory.

What is the first step in implementing the 'combine strings' function?

• Check if the input strings are null.

• Copy the first string into the result.

• Allocate memory for the combined string.

• Concatenate the second string to the result.

What function is used to determine the length of a string in C?

• strlen()

• strcat()

• strcpy()

• malloc()

What should be done if malloc fails to allocate memory?

• Ignore the error and proceed.

• Try allocating memory again.

• Return null.

• Return a default string.

Which function is used to copy a string in C?

• sprintf()

• strcpy()

• malloc()

• strcat()

What is the purpose of setting a pointer to null after freeing it?

• To prevent memory leaks.

• To avoid dangling pointers.

• To increase program speed.

• To reduce memory usage.