{}
//C Programo implement stacks using arrays
#include <stdio.h>
int stack[100],i,j,choice=0,n,top=-1;
void push();
void pop();
void show();
void main ()
{
printf("Enter the number of elements in the stack ");
scanf("%d",&n);
printf("*********Stack operations using array*********");
printf("\n----------------------------------------------\n");
while(choice != 4)
{
printf("Chose one from the below options...\n");
printf("\n1.Push\n2.Pop\n3.Show\n4.Exit");
printf("\n Enter your choice \n");
scanf("%d",&choice);
switch(choice)
{
case 1:
{
push();
break;
}
case 2:
{
pop();
break;
}
case 3:
{
show();
break;
}
case 4:
{
printf("Exiting....");
break;
}
default:
{
printf("Please Enter valid choice ");
}
};
}
}
void push ()
{
int val;
if (top == n )
printf("\n Overflow");
else
{
printf("Enter the value?");
scanf("%d",&val);
top = top +1;
stack[top] = val;
}
}
void pop ()
{
if(top == -1)
printf("Underflow");
else
top = top -1;
}
void show()
{
for (i=top;i>=0;i--)
{
printf("%d\n",stack[i]);
}
if(top == -1)
{
printf("Stack is empty");
}
}