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#include<stdio.h>
#include<stdlib.h>
#define CAPACITY 5
void push(int);
int pop(void);
int isfull(void);
int isempty(void);
void traverse(void);
void peek(void);
int stack[CAPACITY],top=-1;
void main()
{
int ch,item;
while(1)
{
printf("stack operations using array n n");
printf("1. push n");
printf("2. pop n");
printf("3.peek n");
printf("4.traverse n");
printf("5.exit n");
printf("enter your choice t");
scanf("%d",&ch);
switch (ch)
{
case 1:printf("enter the element :");
scanf("%d",&item);
push(item);
break;
case 2:item=pop();
if(item==0)
{
printf("stack is underflow n");
}
else
{
printf("popped item : %dn",item);
}
break;
case 3:peek();
break;
case 4:traverse();
break;
case 5:exit(1);
default:printf("invalid choice n");
}
}
}
int isempty()
{
if(top==-1)
{
return 1;
}
else
{
return 0;
}
}
int isfull()
{
if(top==CAPACITY-1)
{
return 1;
}
else
{
return 0;
}
}
void push(int ele)
{
if(isfull())
{
printf("stack is overflow n ");
}
else
{
top++;
stack[top]=ele;
printf("%d pushed n ",ele);
}
}
int pop()
{
if(isempty())
{
return 0;
}
else
{
return stack[top--];
}
}
void peek()
{
if(isempty())
{
printf("stack is empty n ");
}
else
{
printf("peek element : %d n ",stack[top]);
}
}
void traverse()
{
if(isempty())
{
printf("stack is empty n");
}
else
{
int i;
printf("stack elements : n");
for(i=0;i<=top;i++)
{
printf("%d n ",stack[i]);
}
}
}
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