[c] How to run C program on Mac OS X using Terminal?

I am new to C. Here is my "Hello,world!" program.

#include <stdio.h>

int main(void)    
{
  printf("Hello, world!\n");
  return 0;
}

After I try to run it using Terminal it says:

MacBook-Pro-MacBook:~ macbook$ /Users/macbook/Desktop/peng/Untitled1
-bash: /Users/macbook/Desktop/peng/Untitled1: Permission denied
MacBook-Pro-MacBook:~ macbook$ 

Why?

To do this:

1. open terminal

2. type in the terminal: nano ; which is a text editor available for the terminal. when you do this. something like this would appear.

3. here you can type in your C program

4. type in control(^) + x -> which means to exit.

5. save the file by typing in y to save the file

6. write the file name; e.g. helloStack.c (don't forget to add .c)

7. when this appears, type in gcc helloStack.c

8. then ./a.out: this should give you your result!!

Answer is chmod 755 hello - it makes file executable... It is funny, so no-one answered it. I had same problem on MacOS, which is now solved.

nano hello.c make hello chmod 755 hello Then you run it by ./hello

clang --version Apple LLVM version 8.0.0 (clang-800.0.42.1) Target: x86_64-apple-darwin15.6.0

nothing was installed, nano make (clang) chmod - all inside MacOS already

1) First you need to install a GCC Compiler for mac (Google it and install it from the net )

2) Remember the path where you are storing the C file

3) Go to Terminal and set the path

e.g- if you have saved in a new folder ProgramC in Document folder

   then type this in Terminal
    cd Document
    cd ProgramC

4) Now you can see that you are in folder where you have saved your C program (let you saved your program as Hello.c)

5) Now Compile your program

   make Hello
   ./hello

A "C-program" is not supposed to be run. It is meant to be compiled into an "executable" program which then can be run from your terminal. You need a compiler for that.

Oh, and the answer to your last question ("Why?") is that the file you are trying to execute doesn't have the executable rights set (which a compiler usually does automatically with the binary, which let's infer that you were trying to run the source code as a script, hence the hint at compiling.)

First make sure you correct your program:

#include <stdio.h>

int main(void) {
   printf("Hello, world!\n"); //printf instead of pintf
   return 0;
}

Save the file as HelloWorld.c and type in the terminal:

gcc -o HelloWorld HelloWorld.c

Afterwards just run the executable like this:

./HelloWorld

You should be seeing Hello World!

Working in 2019 By default, you can compile your name.c using the terminal

 cc name.c

and if you need to run just write

 ./name.out

For compiling a c program on your latest macOS just type the following in terminal after saving the file with a .c extension and on reaching the path where the file is saved :

cc yourfilename.c

Once you have checked all the errors after compilation (if any), type the following for executing the code :

./a.out

These commands are tested on macOS Mojave and are working perfectly fine, cheers coding!

to compile c-program in macos simply follow below steps

using cd command in terminal go to your c-program location
then type the command present below
make filename
then type
./filename

On Mac gcc is installed by default in /usr/local/bin

To run C:

gcc -o tutor tutor.c