STL for Sorting and searching with user-defined records

/*
5. Use STL for Sorting and searching with user-defined records such as Person Record
(Name, birth date, telephone no), item record (item code, item name, quantity and cost)
*/


#include<iostream>
#include<process.h>
#include<list>
using namespace std;

typedef struct preson
{
int id;
char name[30];
int cost;
int quantity;
}node;
node p1;
list<node> s1;
list<node>::iterator p;
bool operator <(node &p,node &q)
{
if(p.id<q.id)
return true;
else
return false;

}
void create()
{
int i,n;
cout<<"\n\nHow many records u want to insert= ";
cin>>n;

for(i=0;i<n;i++)
{
cout<<"\n\nEnter code=";
cin>>p1.id;
cout<<"\n\nEnter Name= ";
cin>>p1.name;

cout<<"\n\nEnter cost= ";
cin>>p1.cost;

cout<<"\n\nEnter quantity= ";
cin>>p1.quantity;

s1.push_back(p1);

}

}
void display()
{
cout<<"\nThe Contents of the List = ";
cout<<"\n\nID\tName \tCost\tQuantity\n\n";

for(p=s1.begin();p!=s1.end();p++)
{
cout<<"\n"<<(*p).id;
cout<<"\t"<<(*p).name;
cout<<"\t"<<(*p).cost;
cout<<"\t\t"<<(*p).quantity;

}

}
void search()
{
int temp;
cout<<"\nThe Searching Opeartion = ";
cout<<"\n\nEnter the Product_ID= ";
cin>>temp;
     int flag=0;
for(p=s1.begin();p!=s1.end();p++)
{
if((*p).id==temp)
{
cout<<"\nEntered Product is found";
cout<<"\n\nID\tName \tCost\tQuantity\n\n";
cout<<"\n"<<(*p).id;
cout<<"\t"<<(*p).name;
cout<<"\t"<<(*p).cost;
cout<<"\t\t"<<(*p).quantity;
flag=1;
break;
}
}
if(!flag)
cout<<"\nSuch Record is not found. ";

}
void sort()
{
s1.sort();
cout<<"\nRecords sorted successfully. ";

}


void main()
{
int ch;
do{
cout<<"\nPerson Database Program:-";
cout<<"\n1. Create \n2. Display \n3. Search\n4. Sort\n5. Exit.";
cout<<"\nEnter UR choice= ";
cin>>ch;
switch(ch)
{
case 1:
  create();
  break;
case 2:
  display();
  break;
case 3:
  search();
  break;
case 4:
  sort();
  break;
case 5:
  exit(0);


}
}while(ch!=5);

}

OUTPUT:-


Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice= 1


How many records u want to insert= 3


Enter code=101


Enter Name= abc1


Enter cost= 100


Enter quantity= 10


Enter code=103


Enter Name= abc3


Enter cost= 225


Enter quantity= 7


Enter code=102


Enter Name= abc2


Enter cost= 150


Enter quantity= 4

Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice= 2

The Contents of the List =

ID      Name    Cost    Quantity


101     abc1    100             10
103     abc3    225             7
102     abc2    150             4
Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice= 3

The Searching Opeartion =

Enter the Product_ID= 102

Entered product is found

ID      Name    Cost    Quantity


102     abc2    150             4
Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice= 4

Records sorted successfully.
Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice= 2

The Contents of the List =

ID      Name    Cost    Quantity


101     abc1    100             10
102     abc2    150             4
103     abc3    225             7
Person Database Program:-
1. Create
2. Display
3. Search
4. Sort
5. Exit.
Enter UR choice=5