C program that copies the content of one stack into another .Use stack stack library. Neither stack should be changed.

 C program that copies the content of one stack into another .Use stack stack library. Neither stack should be changed.

#include<stdio.h>

#include "stststack.h"

int main(void)

{

    stack s1,t,s2;

    init(&s1);

    init(&s2);

    init(&t);

    int i,n,num;

    printf("How many elements in stack1: ");

    scanf("%d",&n);

    printf("Enter element in stack1: ");

    for(i=0;i<n;i++)

    {

        scanf("%d",&num);

        push(&s1,num);   //pushing elements in stack1

    }

    while(!isempty(&s1))

     {

         push(&t,pop(&s1));   //pushing stack1 elements in temporary stack

     }

    while(!isempty(&t))

     {

         push(&s1,peek(&t));   //pushing temporary stack element in stack1

         push(&s2,pop(&t));    //pushing temporary stack element in stack2

     }

     printf("\n-----Elements of stack1 is copied in stack2------\n");

}

Output:

How many elements in stack1: 5

Enter element in stack1: 78 12 65 22 11



-----Elements of stack1 is copied in stack2------



Process returned 0 (0x0)   execution time : 15.509 s

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Stack Library:

typedef struct stack
{
    int data[200];
    int top;
} stack;
void push(stack *ps,int num)
{
    ps->data[++ps->top]=num;
}
int pop(stack *ps)
{
    int num;
    num=ps->data[ps->top--];
    return num;
}
int isempty(stack *ps)
{
    if(ps->top==-1)
        return 1;
    return 0;
}
int isfull(stack *ps)
{
    if(ps->top==20-1)
        return 1;
    return 0;
}
int peek(stack *ps)
{
return ps->data[ps->top];
}
int init(stack *ps)
{
    ps->top=-1;
}