C++ Const Declaration for the size of an array

 #include <iostream.h> 
  #include <conio.h> 
  const int size = 7; 
  void main(void) 
 { 
               float temp[size],max; 
               clrscr(); 
               cout<< "enter the temperatures on days in a week"<<'\n'; 
               for(int i=0;i<size; i++) 
               { 
                       cin>>temp[i]; 
                       cout<<"Temperature on day : "<< i+1<<" : "<<temp[i]<<'\n'; 
               } 
                       max=temp[0]; 
                       for(i=0; i<size; i++) 
                           { 
                               if (temp [i]>max) 
                                   max= temp[i]; 
                           } 
                                   cout<<"The maximum temperature in the week is " << max; 
                                   cout<<"\n" ; 
                                   getch(); 
 }