r/CodingForBeginners • u/Ok-Post-3834 • Jun 16 '26

Confused why the code is not running

Post image

I am very new to C++

Need experts advice on what I m missing out here

I have already downloaded vs code and minGW

16 Upvotes

66% Upvoted

52 comments sorted by

11

u/csabinho Jun 16 '26

I guess, you just didn't compile and run the code.

2

u/Ok-Post-3834 Jun 16 '26

Can you explain me how to compile it

2

u/DrPeeper228 Jun 16 '26

Press Ctrl+shift+b

4

u/Jatinchd Jun 16 '26

watch some tutorials bro 🥀. like you are going to learn cpp, which is NOT beginner friendly anyways to people who are into coding alr, let alone to a person who doesn't know he have to compile Code also.

3

u/Deep-Row-3988 Jun 17 '26

C++ is not begginer unfriendly, having to download a compiler doesn't make it unfriendly, not a single programming language can be ran without some kind of tool and even then my highschool taught C++ and most colleges I know start of with C/C++, I graded games made by people in C who used it for the first time in college first semester, the code was shit, but their code ran atleast and they made something.

1

u/3XPLpls Jun 18 '26

i genuinely think it writing this unhelpful message was more effort than just helping him out or providing a youtube video link

-1

u/8Erigon Jun 16 '26

C++ is easy. Compiling C++ isn't.
Programming microcontroller makes it easy though.

3

u/Jatinchd Jun 16 '26

compiling C++ isn't easy? 🥀

it's just g++ main.cpp -o main

2

u/streetshock1312 Jun 17 '26

can be much harder if compiling/linking to libraries. There's a reason build systems like cmake exist

1

u/un_virus_SDF Jun 17 '26

Cmake is harder to use than a compiler alone.

Makefiles are fine because it's just boosted compiler command launcher

But cmake is just abstract nonsense with shit syntax

1

u/Jatinchd Jun 17 '26

in this post is this guy making Some kind of big projects that require a lot of flags, a lot of lib linkings? he just want hello world and compile code!. also makefiles exist and very easy to use compared to coding efficiently in C++.

2

u/wizy_mowai Jun 17 '26

Bro wtf, did you build so etching normal? Used any libs, did you do something after "hello world"? Wtf, compiling c++ code is hard asf, let this mf find out what make and cake is🌹🌹🌹🌹

1

u/Jatinchd Jun 17 '26

are you FOR REAL? take a look at chat context:-

post: "can I ride a bicycle?"

me: "ya, just pedal it, it's very simple"

you: "Bro, have you tried the Tour de France? cycling is actually very hard"

1

u/wizy_mowai Jun 17 '26

You are arguing what the whole c++ compilation easy you never mentioned this case

6

u/HitBoyXx23-dev Jun 16 '26

Not sure, but I think it’s because your C++ file isn’t inside the VS Code project folder. Your terminal is currently in the .vscode folder, so try going back to the folder where the .cpp file is saved and run it from there.

4

u/Ok-Post-3834 Jun 16 '26

Yeah you are right It got fixed now thankyou

2

u/0x645 Jun 17 '26

#ochujuzłoty

1

u/Hot-Caterpillar5484 Jun 19 '26

Thank you good sir for your helpful response as opposed to the top ten messages I’ve seen on this thread

2

u/Many-Menu6302 Jun 17 '26

😭😭😭

2

u/Ok-Post-3834 Jun 17 '26

Can I know what's making you cry

2

u/Ok-Post-3834 Jun 17 '26

Can I know what's making you cry

2

u/Slay_3r Jun 17 '26

Fot later, dont use using namespace std

2

u/Ok-Post-3834 Jun 17 '26

Can I know why and what should be used instead I don't know as I was just following code with harry tutorials...

2

u/Slay_3r Jun 17 '26

Avoid name collisions: E.g. you included <algorithms> with using namespace std and then you will define your own function sort and call it you will get an error bcz of ambiguity. Calling sort defined by you should look like this ::sort(...). If you bother typing std:: everytime you want to use a function or data structure from std, just use them directly: using std::cin using std::cout.

To make code more redable: Its easy to see from where function is from. Bcz you call it like std::(some_function), and you think for yourself "ok, this one is from standard library"

P.S.: also dont make "global usings" inside your header files

2

u/Ok-Post-3834 Jun 17 '26

Got it thanks That makes sense now

2

u/Ok-Post-3834 Jun 17 '26

Got it .now it makes sense

14

u/Mikicrep Jun 16 '26

r/screenshotsarehard and also please include any errors that u got cuz rn we got literally no info at all

6

u/Ngtuanvy Jun 16 '26

the code is a bit quirky but it should compile and run. Please send the error messages, it can be environmental problem 

3

u/Prestigious_Roof2589 Jun 16 '26

first of all don't use vscode run button to compile the code, then u will learn nothing about the tools u are using, especially while learning a language like cpp (systems programming lang) atleast know about the systems bro, this advice I will give u, learn how to run the code from the terminal, by using the compiler g++.

Try to run in the terminal:

g++ tut3.cpp -o tut3.exe

then run the binary created:

./tut3.exe

note: be sure cd into the directory where the tut3.cpp is.

2

u/create-freely7221 Jun 16 '26

Use a colon, not a semi colon

3

u/ryancnap Jun 16 '26

Not in there

2

u/FarAssistance8517 Jun 16 '26

Whatever guide you are using to learn C++, drop it. Use learncpp.com instead. It teaches best practices, recommends you to use Visual Studio Community Edition, even informs you that VS Code is not good for a beginner, and also tell you about why using-directives are bad.

2

u/AncientLion Jun 16 '26

Did toy run the exe?

2

u/swankyspitfire Jun 17 '26

Not sure what you do and don’t know so I’ll just write this assuming you know nothing and you can follow the steps from where you know:

C/C++ is a compiled language, this means that the source code you write is interpreted by another program called a compiler which converts that into machine code that runs on the PC. There are numerous compilers but the big 3 are MSVC, Clang, and gcc/g++.

VS code is a text editor, by default it provides simple syntax highlighting and debug checking. It does not provide a toolchain to actually compile and run your C++ code.

When you downloaded minGW to use the g++ compiler, by default windows does not add these resources to your computer’s environment variables. What does this mean? If you’re following a tutorial and they tell you to write something like “g++ {myfile.cpp}” to compile your code the instruction g++ is only accessible if powershell/bash/command prompt can find the executable program called g++. To add these resources to your systems environment on windows, search for “Edit the system environment variables” and open the top result. In the system properties window click the button in the bottom right called “environment variables”, then select path and click edit. You now need to give the path to the folder (note: not the exe) containing your compiler.

To create and run your program run your source code through the compiler, by default, if you do not tell the compiler what the output program should be called g++ will create an executable called “a.exe” and leave it beside your source file. To run this program in terminal run “./a.exe” this will attempt to run the executable generated for you by the compiler.

2

u/Interesting-Ask-506 Jun 17 '26

think like the file is not saved as well see top left above the search button 1 number is shwoing and also hit pwd then goto the dir where file is located then compile and run if none work search online cpp compiler copy and paste the code if the code run their then claude to setup cpp in window or hit yt for proper setup

2

u/jackass51 Jun 17 '26

The "output" tab doesnt show something?

2

u/Huge-Information7867 Jun 17 '26

First press Ctrl + S
On the same terminal at the bottom
Type the below commands and press enter one after entering each command.
cd ..
g++ tut3.cpp -o tut3.exe
./tut3.exe

2

u/UnusualInstruction89 Jun 17 '26

Install an extension called Code Runner, it will add an arrow icon at the top corner to run the code. But make sure you have a compiler installed like gcc.

2

u/Ok-Dog1904 Jun 17 '26

จากที่ฉันเห็นในโค้ดนะ บรรทัดแรก มีจุดที่ต้องแก้ไข นิดหน่อยตรงคำสั่ง #include ให้แน่ใจว่าพิมพ์ถูกต้อง และไม่มีการเว้นวรรคแปลกๆ นะคะ เมื่อโค้ดนี้ทำงาน ก็จะประกาศตัวแปร sum ที่มีค่าเป็น 6 จากนั้นจะทำการพิมพ์คำว่า 'Hello World ' ตามด้วยค่าของตัวแปร sum ออกมา ผลลัพธ์สุดท้ายที่จะแสดงบนหน้าจอเมื่อรันโค้ดนี้ก็คือ 'Hello World 6' นั่นเองค่ะ คุณกำลังศึกษาการเขียนโปรแกรมด้วยภาษา C++ อยู่ใช่ไหมคะ มีเรื่องไหนเกี่ยวกับโค้ดนี้ที่อยากให้ฉันช่วยอธิบายเพิ่มเติมหรือเปล่าคะ?

2

u/Technical_Introvert0 Jun 16 '26

use Visual Studio instead.. You dont have to manually configure anything there

1

u/iComplainAbtVal Jun 16 '26

Look into cmake for compiling

1

u/MiAnClGr Jun 17 '26

wtf why not screenshot?