How to output elements inside of stack during RPN Calculating - c

Question

I implemented an RPN Calculator in C. Now I want to output the current iteration meaning
Iteration 1: Contents: [5, 5]
Iteration 2: Contents: [25]
I am not quite sure how i am going to print them. I tried Printing them in the main function, but the output was coming
Iteration 1: Contents: 5
Iteration 2: Contents: 5
10
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#define MAX_SIZE 100
int stack[MAX_SIZE];
int top = 0;
void makeEmpty()
{
top = 0;
}
bool isEmpty()
{
return top == 0;
}
bool isFull()
{
return top == MAX_SIZE;
}
void push(int value)
{
stack[top++] = value;
}
int pop()
{
if(isEmpty())
{
printf("Not enough operands in expression\n");
exit(EXIT_FAILURE);
}
return stack[--top];
}
//adds 2 integers
int add(int a, int b)
{
return a + b;
}
//subtracts 2 integers
int sub(int a, int b)
{
return a - b;
}
//multiplies 2 integers
int mul(int a, int b)
{
return a * b;
}
//divides 2 integers
int divide(int a, int b)
{
return a / b;
}
int main(void)
{
char ch;
while(1)
{
//Emptying the stack before the user enters another expression
makeEmpty();
printf("Enter an RPN expression: ");
//Reads expression from user
scanf("%c", &ch);
//parse all characters until a newline is reached
while(1)
{
if(ch == '\n')
break;
//if character is an integer
if(ch >= 48 && ch <= 57)
{
if(!isFull())
{
//convert char to int and push integer onto stack
printf("Iteration %d: Contents: %d \n", (top+1), (ch-48));
push(ch - 48);
}
else
{
//stack ran out of space, print error and exit program
printf("Expression is too complex\n");
exit(EXIT_FAILURE);
}
}
switch(ch)
{
case '+':
push(add(pop(), pop()));
break;
case '-':
push(sub(pop(), pop()));
break;
case '*':
push(mul(pop(), pop()));
break;
case '/':
push(divide(pop(), pop()));
break;
case '=':
printf("%d\n", pop());
break;
}
//get next character
scanf("%c", &ch);
}
}
return 0;
}

Answer 1

You can easily workaround it in your program without creating temporary stacks:
void print_stack(void)
{
printf("[");
for(int index = top -1; index >= 0; index--)
{
printf("%d%s", stack[index], index ? ", " : "");
}
printf("]\n");
}