C++ Program That Converts Postfix Expressions to Assembly Help

[oreodrinker]

First and foremost:

Please do not write the program out for me. I'm merely looking for guidance on where to go.

I understand the concept behind postfix functions, and how to convert them to an assembly code(LDA X, MUL B) on paper. This will be using push/pop functions that I already have.

void push(string s, string stack[], int& sp, int size)
{
stack[++sp] = s;
}

string pop(string stack[], int& sp, int size)
{
s = stack[--sp];
}

I'm more or less thoroughly confused of where to go after prompting the user for the postfix expression to be entered.

Thank you for any help you will be able to give me.