/* program with struct examples */ 

#include <stdio.h>

/* declare a variable */ 
struct 
{
    int first; 
    int second; 
} struct_var; 

/* declare a data type using struct */ 
struct struct_type
{
    int first; 
    int second; 
}; 

/* declare a data type using typedef and struct */ 
typedef struct 
{
    int first; 
    int second; 
}  typedef_struct_type; 

void print_struct_type_var(struct struct_type variable)
{
    printf("The struct type variable has the values %d and %d\n", 
           variable.first, variable.second); 
}

void print_struct_type_var_pointer(struct struct_type *variable)
{
    printf("The struct type variable has the values %d and %d\n", 
           variable->first, variable->second); 
}

void print_typedef_struct_type_var(typedef_struct_type variable)
{
    printf("The typedef struct type variable has the values %d and %d\n", 
           variable.first, variable.second); 
}

void print_typedef_struct_type_var_pointer(typedef_struct_type *variable)
{
    printf("The typedef struct type variable has the values %d and %d\n", 
           variable->first, variable->second); 
}

int main(void)
{
    struct struct_type struct_type_var; 

    typedef_struct_type typedef_struct_type_var; 

    struct_var.first = 1; 
    struct_var.second = 2; 

    struct_type_var.first = 3; 
    struct_type_var.second = 4; 

    typedef_struct_type_var.first = 5; 
    typedef_struct_type_var.second = 6; 

    printf("The struct variable has the values %d and %d\n", 
           struct_var.first, struct_var.second); 

    print_struct_type_var(struct_type_var); 
    print_struct_type_var_pointer(&struct_type_var); 

    print_typedef_struct_type_var(typedef_struct_type_var); 
    print_typedef_struct_type_var_pointer(&typedef_struct_type_var); 

    return 0; 
}