Stack using Array C Program.

stack-using-array.c

#include<stdio.h>
#include<stdlib.h>
#define MAX 10

int top = -1;
int stack[MAX];

void push(int val) {
	stack[++top] = val;
	printf("Value Pushed!\n");
}

int pop() {	
	int temp = stack[top];
	stack[top--] = 0;
	return temp;	
}

void display() {
	int i=0;
	for(i=0;i<=top;i++) {
		printf("> %d\n", stack[i]);
	}
}

int checkFull() {
	if(top == MAX-1) {
		printf("Stack is Full!!\n");
		return 0;
	}
	return 1;
}

int checkEmpty() {
	if(top == -1) {
		printf("Stack is Empty!!\n");
		return 0;
	}
	return 1;
}

int main() {	
	int choice = 0;
	int value = 0;
	while(1) {
		printf("1. Push\n2. Pop\n3. Display\n4. Exit\n >>> ");
		scanf("%d", &choice);
		switch(choice) {
			case 1:
				if(checkFull()) {
					printf("Enter the Number to push >> ");
					scanf("%d", &value);
					push(value);
				}
				break;
			case 2:
				if(checkEmpty()) {
					printf("Popped element is %d\n", pop());
				}
				break;
			case 3:
				if(top != -1) {
					display();
				}
				break;
			case 4:
				exit(0);
				break;
			default:
				printf("Wrong Choice!");
				exit(0);				
		}
	}
	return 0;
}