1)How do u access functions that are within structures and make them return a value to not the main but to another (void) function ? ( Dunno if qn is phrase is correctly ??)
2)Below is an excerpt from a vending machine program in C++ but how do u convert to C without using :the scope resolution operator) ? or Is the below program unable to be converted to C...
BTW: some reasoning of the program may be wrong especially the data inside Convert_to_Denom as this part is wat me coded moiself...^^;;

Mani Thks for all who readin tis


#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>

struct coins{


int denomination;

void setDenom(int);
int getDenom();
};

struct machine{

struct coins ten, twenty, fifty;
};

void Convert_to_Denom(struct machine *m);

main()
{
struct machine *mac;
Convert_to_Denom(&mac);

return 0;
}

void Convert_to_Denom(struct machine *m)
{
m->fifty.setDenom(50);
m->twenty.setDenom(20);
m->ten.setDenom(10);

printf("%d",m->fifty.getDenom());
printf("%d",m->twenty.getDenom());
printf("%d",m->ten.getDenom());

}
void coins::setDenom(int D)
{
denomination = D;
}

int coins::getDenom()
{
return denomination;
}

Well as for question 1 - Huh? Do you mean in C or C++? In either you can use a pointer to a function as a parmeter of another function so the value is passed in the stack an not held in storage within the scope on the main program body.

Question 2 - You mostly have the code in C format already. All you need to do is not declare the functions inside of a class (you declared it as a structure).

You need to study. We do do not do your homework here. BTW please attempt proper grammatical syntax in you corresponence. Sloppy language promotes sloppy code.