Slip 2_2 ,Slip 8_2, Slip 17_2: Write a program that copies the contents of one stack into another. Use stack library to perform basic stack operations. The order of two stacks must be identical.(Hint: Use a temporary stack to preserve the order).

-
 #include <stdio.h>
char s[20];
int top;
void init()
{
 top=-1;
}
int isempty(){
 if(top==-1)
 return 1;
 else
 return 0;
}
int isfull()
{
 if(top==19)
 return 1;
 else
 return 0;
}
void push(char ch)
{
 if(isfull()==1)
 printf("stack is full");
 else
 {
 top++;
 s[top]=ch;
 }
}
char pop()
{
 char ch;
 if(isempty()==1)
 printf("stack is empty");
 else
 {
 ch=s[top];
 top--;
 }
 return ch;
}
main()
 {
 int i,k=0;
 char temp[20];
 init();
 char str[20];
 printf("enter string ");
 scanf("%s",str);
 for(i=0;str[i]!='\0';i++)
 {
 push(str[i]);
 }
 while(!isempty())
 {
 temp[k]=pop();
 k++;
 }
 temp[k]='\0';
 //Again String push into stack
 printf("second string :");
 for(i=0;temp[i]!='\0';i++)
 {
 push(temp[i]);
 }
 while(!isempty())
 {
 printf("%c",pop());
 }
 }

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