Can we malloc structures in c?

Question

I am working on a CUI library management system in C and I don't know how or can we malloc structures. If we con then how to. If we cannot then alternatives.
Here is the code I tried:
int num;
struct library
{
.....
};
struct library *a;
printf("Enter number of books");
scanf("%d",&num);
a = (struct*)malloc(num * sizeof(libary));
thanks in advance.

Answer 1

You can dynamically allocate structures just like built-in types. The problem is your allocation line. Right now you cast the pointer to "struct*", which is not a type and should be "struct library*". Similar with the call to sizeof(), which needs to be "struct library" since you didn't typedef the struct. Therefore the fixed line would be:

a = ( struct library* ) malloc ( num * sizeof ( struct library ) );

Answer 2

Thanks shadow for your help.