stack.cpp

stack.cpp

//Stack using array
//Author: Milon

#include<stdio.h>
//#include<conio.h>

#define max 50

void push();
void pop();
void display();

int top=0;
int stack[max];

void main(){
    int c=0;
    char ch;
    do{
        //clrscr();
        printf("This program is for Push & Pop operation.\n");
        printf("Enter your choice:\n");
        printf("# (P)ush operatino.\n");
        printf("# Pop (O)peration.\n");
        printf("# (D)isplay stack.\n");
        printf("# (E)xit.\n\n");
        printf("Enter your choice: ");
        ch=getchar();
        switch(ch){
            case 'P':
            case 'p':
                push();
                break;
            case 'O':
            case 'o':
                pop();
                break;
            case 'D':
            case 'd':
                display();
                break;
            case 'E':
            case 'e':
                c=1;
                break;
            default:
                printf("\nInvalid input.");
                //getch();
                break;
            }
        }while(c!=1);
    }

void push(){
    int data;
    if(top==max){
        printf("\nStack is overflow.");
        //getch();
        return;
        }
    printf("\nEnter data for Push: ");
    scanf("%d",&data);
    top=top+1;
    stack[top]=data;
    printf("\nPush operation complete successfully.");
    //getch();
    }

void pop(){
    if(top==0){
        printf("\nStack is underflow.");
        //getch();
        return;
        }
    printf("\nData %d is deleted.",stack[top]);
    top=top-1;
    printf("\nPop operation complete successfully.");
    //getch();
    }

void display(){
    if(top==0){
        printf("\nStack is empty.");
        //getch();
        return;
        }
    printf("\nStack: ");
    for(int i=1;i<=top;i++)
        printf("%d -->",stack[i]);
    //getch();
    }