C++ Program Compilation
Video Summary: https://youtu.be/FgfDeW-2Ru0
Compile your C++ program on Replit
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
You will need to rebuild your program every time you make changes to it. Luckily, once you have written these commands once, you can press the up arrow while in the console to recall previous commands, so you only need to actually write it once.
Summary
| 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 specified by the name following -o. When you don't use -o, the executable filename will be called a.out. |