Thread: how can I use pointer to structer ?

how can I call and print the Pointer : ptr->address

Code:

#include<stdio.h>
struct account
{
    int address;
    int value;
};
 typedef struct account act;

 void get_value(int *a){
     *a += 10;

 };
void get_address(int *s){
    *s+=100;

}
main()
{
    act *ptr;
    act act1;
    act1.value = 20 ;
    ptr->address = 20;


    get_address(&ptr->address);
    get_value(&act1.value);

   printf("    %i\n " ,act1.value);
   printf("    %i " ,ptr->address);
}