Running C / C++ in Ubuntu

1. Install the build-essential package by typing the following command in the terminal: sudo apt-get install build-essential
2. Now create a file that has the extension .c (if you plan to write a C program) or .cpp (for a C++ program).
3. Write the code in that file.
4. Now open a terminal and go to the place where you saved that file using the cd command (e.g. cd Desktop).
5. If you have a C program type in the terminal 
• gcc -Wall -W -Werror hello.c -o hello.c
• The first line will invoke the GNU C compiler to compile the file hello.c and output (-o) it to an executable called hello.
• The options -Wall -W and -Werror instruct the compiler to check for warnings.
6. If you have a C++ program simply replace gcc with g++ and hello.c with hello.cpp. The options do the same things.
7. If you get a permissions error, you need to make the file executable. You can do this with chmod +x hello.cpp
8. Now type in the terminal ./hello and the program will run.