Stack Using Array


/*******************************************************************************/
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>

#define MAX_SIZE 100

// Global variables for the stack
int stack[MAX_SIZE];
int top = -1; // Initialize an empty stack

// Function to push an element onto the stack
void Push(int element) {
    if (top == MAX_SIZE - 1) {
        printf("Stack overflow: Cannot push element onto a full stack\n");
        return; // Handle overflow (stack is full)
    }
    top++;
    stack[top] = element;
}

// Function to pop an element from the stack
int Pop() {
    if (top == -1) {
        printf("Stack underflow: Cannot pop element from an empty stack\n");
        return -1; // Handle underflow (stack is empty)
    }
    int element = stack[top];
    top--;
    return element;
}

// Function to peek at the top element of the stack
int Peek() {
    if (top == -1) {
        printf("Stack is empty Underflow!\n");
        return -1; // Handle underflow (stack is empty)
    }
    return stack[top];
}

// Function to check if the stack is empty
bool IsEmpty() {
    return (top == -1);
}
void Display()
{ int i;
    if(IsEmpty()) printf("Stack is empty Under flow!\n");
    else
    {
    printf("Stack contents are\n");
    for(i=top;i>=0;i--)
    printf("%d\n",stack[i]);
    }
}
int main() {
int item, choice;
printf("\t\t\tImplementation Of Stack ");

do {

printf("\n\n1.Push\n2.Pop\n3.Peek\n4.Display\n5.exit\n");
printf("\nEnter Your Choice :: ");
scanf("%d", &choice);
switch (choice) {
case 1:
    printf("\nEnter The item to be pushed :: ");
    scanf("%d", &item);
    Push(item);
    break;
case 2:
    if (IsEmpty())
        printf("\nEmpty stack!Underflow !!");
    else {
        item = Pop();
        printf("\nThe popped element is %d", item);
        }
    break;
case 3:
    if (IsEmpty())
        printf("\nEmpty stack!Underflow !!");
    else {
        item = Peek();
        printf("\nThe Top element is %d", item);
    }
    break;
case 4:
    Display();
    break;
case 5:
    exit(0);
}
} while (1);
return 0;
}

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