STACK

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#include<stdio.h> #include<iostream.h> #include<conio.h> int i,ch,top=0,stack[10]; //varibles needed for stack operation. void menu(); //function declaration. void push(); void pop(); void show(); void main() { menu(); } void menu() { cout<<"\n\n\n1:PUSH\n2:POP\n3:SHOW\n"; //user choices to select for their preference PUSH, POP OR SHOW element IN stack. cin>>ch; switch(ch) { case 1 : push(); main(); //if user select choice 1 functions push(); executed and come back to main(); break; case 2 : pop(); main(); //if user select choice 2 functions pop(); executed and come back to main(); break; case 3 : show(); main(); //if user select choice 1 functions push(); executed and come back to main(); break; } } void push() //push is a function to insert element to stack. { clrscr(); if(top<=9) { cout<<"ENTER ELEMENT TO ADD\n"; cin>>stack[top]; top++; //increment top by 1 } else { cout<<"STACK IS FULL\n"; } } void pop() //function to delete a element from stack. { if(top<=0) { cout<<"STACK IS EMPTY\n"; } else { --top; cout<<"\n"<<stack[top]<<" IS DELETED FROM STACK\n"; } } void show() //function to show elements of stack. { cout<<"\n\n\n"; if(top>0) { for(i=0;i<top;i++) { cout<<stack[i]<<","; } } else //if no elements in stack it will display 'STACK IS EMPTY'. { cout<<"STACK IS EMPTY\n"; } }