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stackusingarray.c
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#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
void push(int) ;
int pop() ;
void display() ;
int stack[10] ;
int top = -1 ;
int main()
{
int ch , i , item ;
while(1)
{
printf("choose one \n1. Push\n2. Pop \n3. Display \n4. exit \n") ;
scanf("%d",&ch) ;
switch(ch)
{
case 1 :
printf("Enter the item\n") ;
scanf("%d", &item) ;
push(item) ;
break ;
case 2 :
printf("poped item is %d \t", pop()) ;
break ;
case 3 :
display() ;
break ;
case 4 :
exit(0) ;
}
}
}
void push(int item)
{
if(top == 9)
printf("Stack overflow\n") ;
else
{
top++ ;
stack[top] = item ;
}
}
int pop()
{
int n ;
if(top < 0)
{
printf("stack uderflow") ;
return n ;
}
else
{
n = stack[top] ;
top-- ;
return n ;
}
}
void display()
{
int i ;
printf("elements of stack are\n") ;
for(i = top ; i >= 0 ; i--)
{
printf("%d \t", stack[i]) ;
}
}