Compiling a program

• The compiler is g++, another fine GNU product.
• Much information is available by typing man g++
• For now, the following will help.

Using g++

• g++ filename.ext
• c++ filename.ext works as well
• It expects a file to end with .c, .C or .cpp
• g++ afile.cpp will produce
  • Error messages
  • or an executable file called a.out
• To run a.out type a.out
• Type in the following program, compile, and run it

  #include <iostream>
  main () {
     cout << "Hello World" << endl;
  }
     

• You can name your executable with the -o option
  • g++ -o outfilename file.cpp
  • usually you see something like:

    g++ -o afile afile.cpp
    

  • but this is not required to be the case.
  • Please compile your program with the -o option.
• There are MANY more options for the compiler, but for now that will do.