int main(int argc, char *argv[])
{
char *char_ptr;
int *int_ptr;
int mem_size;
if (argc < 2)
{
mem_size = 50; // Use 50 as default value if no CLI args present
}
else
{
mem_size = atoi(argv[1]);
}
printf("\t[+] allocating %d bytes of memory on the heap for char_ptr\n", mem_size);
char_ptr = (char *) errorchecked_malloc(mem_size);
strcpy(char_ptr, "this is memory located on the heap");
printf("char_ptr (%p) --> %s\n", char_ptr, char_ptr);
printf("\t[+] allocating 12 bytes of memory on the heap for int_ptr\n");
int_ptr = (int *) errorchecked_malloc(12);
*int_ptr = 31337;
printf("int_ptr (%p) --> %d\n", int_ptr, *int_ptr);
free(char_ptr);
free(int_ptr);
}
int main(int argc, char *argv[]) {
char *char_ptr; // a char pointer
int *int_ptr; // an integer pointer
int mem_size;
if (argc < 2) // if there aren't commandline arguments,
mem_size = 50; // use 50 as the default value..
else
mem_size = atoi(argv[1]);
printf("\t[+] allocating %d bytes of memory on the heap for char_ptr\n", mem_size);
char_ptr = (char *) errorchecked_malloc(mem_size); // allocating heap memory
strcpy(char_ptr, "This is memory is located on the heap.");
printf("char_ptr (%p) --> '%s'\n", char_ptr, char_ptr);
printf("\t[+] allocating 12 bytes of memory on the heap for int_ptr\n");
int_ptr = (int *) errorchecked_malloc(12); // allocated heap memory again
*int_ptr = 31337; // put the value of 31337 where int_ptr is pointing
printf("int_ptr (%p) --> %d\n", int_ptr, *int_ptr);
printf("\t[-] freeing char_ptr's heap memory...\n");
free(char_ptr); // freeing heap memory
printf("\t[+] allocating another 15 bytes for char_ptr\n");
char_ptr = (char *) errorchecked_malloc(15); // allocating more heap memory
strcpy(char_ptr, "new memory");
printf("char_ptr (%p) --> '%s'\n", char_ptr, char_ptr);
printf("\t[-] freeing int_ptr's heap memory...\n");
free(int_ptr); // freeing heap memory
printf("\t[-] freeing char_ptr's heap memory...\n");
free(char_ptr); // freeing the other block of heap memory
}
