C++ Program Compilation

If you don't have hello.cpp from Lab 1, you can click on this link hello.cpp to get the code.

A common UNIX command to compile C++ program is g++.

Here is an example of compiling a program named hello.cpp, using

g++ -Wall hello.cpp -o hello

to compile and then using

./hello

to run the program. The -o lets your give a name to the runnable program.

If you compile without -o like this:

g++ -Wall hello.cpp

then you get the default name a.out. You can run it by typing

./a.out

`g++`	g++ is a common UNIX C++ compiler command. UNIX is case sensitive, so don't type a capital G by mistake.
`-Wall`	Turn on all warnings. Notice the capital W. Turns on warnings about subtle mistakes.
`hello.cpp`	Your C++ program name
`-o hello`	The `-o` is used to create an executable file as specifiled by the name following `-o`. When you don't use `-o`, the executable filename will be called `a.out`.