FAQ: Compile & Execute - Comments

This community-built FAQ covers the “Comments” exercise from the lesson “Compile & Execute”.

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This exercise can be found in the following Codecademy content:

Learn C++

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it keeps saying that spell.cpp was moved but every time I reset the exercise it does not get spell.cpp back.


I was just going through lesson 4 of C++ and I have a question. As it says in the lesson, // is used of comments on one line of the program, but what if the comment written after // is longer than a line and reaches two or three lines, would there be an error or would the program still run as normal?

as long as you just let it linewrap you’ll be fine, if you hit return, you’ll get an error. Common practice is to limit your code line length to around 80 characters.

guyyyyys how should i compile and excute !

hello, i was going through 4 lesson of C++ and i got a doubt what would be the change if we write //print “harry potter” instead of //harry potter ??

Why we name the executable file of spell.cpp as spell? Why not anything else such as SP or ttp etc?

I am really not happy with these tutorials. No detailed explanations on what to do and no help.

What is the difference between doing
g++ spell.cpp then ./a.out
g++ spell.cpp -o spell then ./spell
Are these two actions the same? Is there a difference? Does it matter?

This might be a dumb question, but why didn’t the code write “expecto patronum”?

It wont get any response.
the line you write after //print"Harry Potter" or /* harry potter */ wont be read by the compiler
this comments were used to make the statement more legible to other people who reads it.

g++ is used to compile the program. spell.cpp or any (speak.cpp)is the file in which you edit codes. cpp is the extension
-o is okay for the machine code in which you store the machine language of your program. spell is the machine language storage space here. and at last you are executing what you have mentioned.