C Tutorial/stdlib.h/malloc
malloc
Item Value Header file stdlib.h Declaration void *malloc(size_t size); Return returns a pointer to the memory. If there is insufficient memory, malloc() returns a null pointer.
It is important to verify that the return value is not null before using it.
Allocate sufficient memory to hold structures of type addr:
#include<stdio.h>
struct addr {
char name[40];
char street[40];
char city[40];
char state[3];
char zip[10];
};
main()
{
struct addr *p;
p = malloc(sizeof(struct addr));
if(p==NULL) {
printf("Allocation Error\n");
exit(1);
}
return p;
}