What are some useful examples of malloc() in C?

Question

I\'m just reading about malloc() in C.

The Wikipedia article provides an example, however it justs allocate enough memory for an array of 10 ints in com

Answer 1

malloc() is used whenever:

1. You need dynamic memory allocation
   If you need to create array of size n, where n is calculated during your program execution, the only way you can do it is using malloc().

2. You need to allocate memory in heap
   Variables defined in some functions live only till the end of this function. So, if some "callstack-independent" data is needed, it must be either passed/returned as function parameter (which is not always suitable), or stored in heap. The only way to store data in heap is to use malloc(). There are variable-size arrays, but they are allocated on stack.