simple program of c++ to understand the use array

This is the source code for understand the simple function of array.
Here we have to calculate the average temperature of 7 days using array in c++.
#include<iostream.h>
#include<conio.h>
main()
{
      float temp[7],sum=0;
      int i=0;
      while(i<=6)
      {
                 cout<<"enter the temp. of day"<<i+1<<"?"<<endl;
                 cin>>temp[i];
                sum=sum+temp[i];
                i++;
                }
                cout<<"\nAverage temperature :"<<sum/7.0;
             
                getch();
                }
End