c++ newbie Question! In need of help! :D?

[Pepsi C]

Hello i wrote this c++ code and when i try to compile it i get bunch of errors and i can't find out what's wrong with it thanks!
p.s. i use dev-C++ 4.9.9.2

#include <iostream.h>
void main()
{
double number1;
double square;
double cube;


cout<< "Enter number nows" endl;
cin>> number1;

if (number1 >= 50);
(
square= number1 * number1;
cout<< "The square is" <<square;
)
else if (number1<50);
cube= number1 * number1 * number1;
cout<< "The cube is " <<cube;


}
Thanks for pointing out my errors however i still get few errors when i try to compile
I shall list the errors in hope of getting some more help...

Line 32:2 # warning this file includes atleast one deprecated or antiquated header.please consider using one of the 32 headers found in section 17

line7 'main' must return 'int'

THANKs Again!

 

[FreeZe]

This:
cout<< "Enter number nows" endl;

Should be:
cout<< "Enter number nows" << endl;

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There are no semi-colons at the end of if( ) / else if( ) statements.

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And i'm not sure if you want curly braces around the two statements following the else-if.

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You need to use either "using namespace std;" OR "using std::cout;" AND "using std::cin;" AND using "std::endl;"