C) Stack [Array]

gistfile1.cpp

//Stack as an array 
#include<iostream.h> 
#include<string.h> 
#define MAX 100 
#include<process.h> 
  
int top; 
  
struct abc 
{ 
    char ename[20]; 
    int enumber; 
    float esal; 
}stack[MAX]; 
  
void push(abc stack[],int &top) 
{ 
     if(top==MAX-1) 
     { 
                   cout<<"stack full"; 
     } 
     else
     { 
         top=top+1; 
         cout<<"\nEnter Employee Name: "; 
         cin>>stack[top].ename; 
         cout<<"Enter Employee Number: "; 
         cin>>stack[top].enumber; 
         cout<<"Enter Employee Salary: "; 
         cin>>stack[top].esal; 
     } 
} 
    
int pop(abc stack[],int &top) 
{ 
    int value; 
    if(top<0) 
    { 
             cout<<"Stack Empty"; 
             value=-1; 
    } 
        
    else
    { 
        value=top; 
        top=top-1; 
    } 
    return(value); 
} 
    
void show(abc stack[],int top) 
{ 
    int i,j; 
    if(top<0) 
    { 
             cout<<"Stack Empty"; 
    } 
    i=top; 
    cout<<"The array is:"; 
    do
    { 
        cout<<"\n\nEmployee Name: "<<stack[i].ename; 
        cout<<"\nEmployee Number"<<stack[i].enumber; 
        cout<<"\nEmployee Salary"<<stack[i].esal; 
        i=i-1; 
    }while(i>=0); 
    cout<<endl; 
    cin>>j; 
} 
    
int main() 
{ 
    int val; 
    top=-1; 
       
    int ch; 
    char opt='y'; 
        
    do
    {  
        system("cls"); 
        cout<<"MAIN MENU"; 
        cout<<"\n1.Add an element"; 
        cout<<"\n2.Delete an element"; 
        cout<<"\n3.Display the array"; 
        cout<<"\n4.Exit"; 
        cout<<"\nEnter your choice: "; 
        cin>>ch; 
        switch(ch) 
        { 
            case 1: 
                   do
                   { 
                       push(stack,top); 
                       cout<<"Do you wish to add more?(y/n): "; 
                       cin>>opt; 
                   }while(opt=='y'); 
                   break; 
            case 2:  
                   opt='y'; 
                   do
                   { 
                       val=pop(stack,top); 
                       if(val!=-1) 
                       cout<<"The topmost stack is now deleted"; 
                       cout<<"\nDo you wish to delete more values?"; 
                       cin>>opt; 
                   }while(opt=='y'); 
                   break; 
            case 3: 
                   show(stack,top); 
                   break; 
            case 4: 
                   exit(0); 
                   break; 
            default: 0; 
        } 
    }while(ch!=4); 
       
    system("pause"); 
    return 0; 
}