C: Pointer Types

#include <stdio.h>

/* How do you make use of pointers. Firstly you store a pointer off in a variable so you can use it later. You can identify the "pointer-type" because there's an asterisk(*) before the variable name and after its type*/

int main(void){
    int i; /* type int*/
    int *p; /* type "pointer to an int" or "int-pointer" */

    return 0;
}

/* When you do an assignment into a pointer variable(*p), the type of the right hand side of the assignment has to be the same type as the pointer variable. ie, you can only assign a fellow int to an int-pointer. Fortunately, when you take the address-of a variable, the resultant type is a pointer to that variable type, so assignments like the one below are perfect */
int another(void){
    int i;
    int *p; /* p is a pointer, but is uninitialized and points to garbage */

    p = &i; /* p now points to i */

    return 0;
}