Question

Write a menu driven program to perform the following

operations of a stack using array by using suitable user defined

functions for each case.

a) Check if the stack is empty b) Display the contents of stack

c) Push d) Pop

Answer 1

#include<stdio.h>
#include<stdlib.h>
#define MAX 5
int top=-1,stack[MAX];
void push();
void pop();
void display();
void main()
{
int option;
while(1)
{
printf("\n\n1.Push\n2.Pop\n3.Display\n4.Exit");
printf("\n\nChoose an option:");
scanf("%d",&option);
switch(option)
{
case 1: push();
break;
case 2: pop();
break;
case 3: display();
break;
case 4: exit(0);
default: printf("\nInvalid option!!");
}
}
}
 
void push()
{
int value;
if(top==MAX-1)
{
printf("\nStack is full!!");
}
else
{
printf("\nEnter element to push:");
scanf("%d",&value);
top=top+1;
stack[top]=value;
}
}
 
void pop()
{
if(top==-1)
{
printf("\nStack is empty!!");
}
else
{
printf("\nDeleted element is %d",stack[top]);
top=top-1;
}
}
 
void display()
{
int i;
if(top==-1)
{
printf("\nStack is empty!!");
}
else
{
printf("\nStack is: \n");
for(i=top;i>=0;--i)
printf("%d\n",stack[i]);
}
}