Program- Create stack using Array
// Stack
#include<stdio.h>
#include<conio.h>
#define size 10
int stack[size];
int tos=-1,flag=0;
void push(int x);
void pop();
int peep();
int update();
void display();
void main()
{
int choice=1,data;
while(choice>=1 && choice<6)
{
do
{
clrscr();
printf("\n\t==================");
printf("\n\t\t Menu");
printf("\n\t==================");
printf("\n\t\t1. Push");
printf("\n\t\t2. Pop");
printf("\n\t\t3. Peep");
printf("\n\t\t4. Update");
printf("\n\t\t5. Display");
printf("\n\t\t6. Exit");
printf("\nEnter Your Choise : ");
scanf("%d",&choice);
}while(choice<1 || choice>6);
switch(choice)
{
case 1:
{
printf("\n\tPush
Operation Selected\n\tEnter Value To be Pushed");
scanf("%d",&data);
push(data);
if(flag==0)
{
printf("\nStack Is Full");
}
else
{
display();
if(tos==size-1)
{
printf("\n Stack Overflow");
}
}
getch();
break;
}
case
2:
{
printf("\n\t POP Operation
Selected");
pop();
if(flag==0)
{
printf("\nStack Empty");
}
else
{
if(tos==-1)
{
printf("\n\t Stack Underflow");
display();
}
}
getch();
break;
}
case
3:
{
printf("\n\tPeep Operation
Selected");
data=peep();
if(flag)
{
printf("\n\t Peeped Element
%d",data);
printf("\n\t Stack is as under");
display();
}
else
{
printf("\n Stack Underflow");
}
getch();
break;
}
case
4:
{
printf("\n\t Update Operation
Selected");
data=update();
if(flag)
{
printf("\n\t Updated Information
%d",data);
printf("\n\t Stack ia as Under");
display();
}
else
{
printf("\n Stack Underflow");
}
getch();
break;
}
case
5:
{
printf("\n\t Display Selected");
display();
getch();
break;
}
}
}
printf("\n End Of Program");
getch();
}
void push(int x)
{
if(tos==size-1)
{
flag=0;
}
else
{
++tos;
stack[tos]=x;
flag=1;
}
}
void pop()
{
if(tos==-1)
{
flag=0;
}
else
{
printf("\n Popped Element %d",stack[tos]);
tos--;
flag=1;
}
}
int peep()
{
int i,
peeped_element;
printf("\n\t
Enter the location of value which you want to peep");
scanf("%d",&i);
if(tos-i+1<0)
{
flag=0;
peeped_element=0;
}
else
{
flag=1;
peeped_element = stack[tos-i+1];
}
return(peeped_element);
}
int update()
{
int i,updated_element;
printf("\n\t Enter the location of value which you want to
update");
scanf("%d",&i);
if(tos-i+1<0)
{
flag=0;
updated_element=0;
}
else
{
flag=1;
printf("\n Possible");
printf("\n Enter Value to Be Updated");
scanf("%d",&updated_element);
stack[tos-i+1]=updated_element;
}
return(updated_element);
}
void
display()
{
int i;
printf("\n Stack Value");
for(i=tos;i>=0;i--)
{
printf("\n\t\t %d",stack[i]);
}
}
Posted By : Ruchita Pandya
