Linear Search

#include "stdafx.h"
#include<iostream>
using namespace std;
int main()
{
int size;
int search_rollnumber;
int *arr;
bool flag=false;
cout<<"\nPlease enter total size of array : ";
cin>>size;
arr=new int [size];
for(int i=0;i<size;i++)
{
cout<<"\nPlease enter a roll number of student no. "<<i+1<<" : ";
cin>>arr[i];
}
cout<<"\nPlease enter a roll number to search : ";
cin>>search_rollnumber;
for(int i=0;i<size;i++)
{
if(arr[i]==search_rollnumber)
{
flag=true;
break;
}
else
{
flag=false;
}
}
if(flag==true)
{
cout<<"\n"<<search_rollnumber<<" is present in array...\n\n";
}
else
{
cout<<"\n"<<search_rollnumber<<" is not present in array...\n\n";
}
return 0;
}