Question

Write a C++ program to read N students records implementing stack using pointers. Each record has a name field and ID field. Your program should have at least the following functions: main(), Read_record.(..), Push.., pop (...)

Answer 1

In the below code, i used the funtion push,pop and display(equivalent to Read_record).

the code is quite simple, i used comments in most of the portion, if you still found it difficult to understand, do comment the comment section, i'll reply ASAP.

#include<iostream>
#include<string.h>

using namespace std;

#define MAX 5 // maximum number of student record can be 5
// you can also make this field as user input

int TOP;
struct Student{
int Id;
char Name[100];
};
Student STACK[MAX];


//stack initialization
void initStack(){
TOP=-1;
}
//check it is empty or not
int isEmpty(){
if(TOP==-1)
return 1;
else
return 0;
}

//check stack is full or not
int isFull(){
if(TOP==MAX-1)
return 1;
else
return 0;
}

void push(int Id,char d[]){
if(isFull()){
cout<<"STACK is FULL."<<endl;
return;
}
++TOP;
STACK[TOP].Id=Id;
strcpy(STACK[TOP].Name,d);
cout<<Id<<" has been inserted."<<endl;
}

void display(){
int i;
if(isEmpty()){
cout<<"STACK is EMPTY.No student record found"<<endl;
return;
}
for(i=TOP;i>=0;i--){
cout<<STACK[i].Id<<","<<STACK[i].Name<<endl;
}
cout<<endl;
}

//pop - to remove student record
void pop(){
int temp;
if(isEmpty()){
cout<<"STACK is EMPTY."<<endl;
return;
}

temp=STACK[TOP].Id;
TOP--;
cout<<temp<<" has been deleted."<<endl;
}

int main(){
int Id;
char Name[100];

initStack();

char ch;

do{
int a;
cout<<"Chosse \n1.push\n"<<"2.pop\n"<<"3.display\n";
cout<<"Please enter your choice: ";
cin>>a;
switch(a)
{
case 1:
cout<<"Enter a ID of student: ";
cin>>Id;
cout<<"Enter Name of the student:";
cin>>Name;
push(Id,Name);
break;

case 2:
pop();
break;

case 3:
display();
break;

default :
cout<<"An Invalid Choice!!!\n";


}
cout<<"Do you want to continue ?y for Yes, n for No ";
cin>>ch;   
}while(ch=='Y'||ch=='y');
return 0;
}