Compiling/Running C Programs?

[Loft]

Okay , after deciding to take the plunge and learn C/C++, I installed the build essential packages. After looking at a few tutorials, I create first.c in gedit and put in the following code:

#include <stdio.h>

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

Then I used 'gcc -o first first.c' This created the executable first. Now according to the tutorial I read (http://farside.ph.utexas.edu/teachin...es/node35.html) I have to enter first into the terminal and it should run. However, it doesn't, I just get a '$ bash: first: command not found' error. How can I run my programs after compiling and linking? Or am I compiling/linking properly in the first place? Thanks.

[lorap]

hi friend!
it'd run
you just have to write:
./first

dot then slash

you work this way,firstly compile the code:

cc -c first.c

that would produce an object file you may need to add to the library.

then create an executable:

cc -o first first.c

after what run it:

./first


have a nice day!
pavel

[Loft]

Thanks! I knew it would be something simple!

[rmjokers]

Just a note:

The reason you have to add the "./" to the filename is because your current working directory is not included in your path. The "./" means run the executable file first from the current directory. Excluding the current directory from the path is common on unix systems to prevent certain security problems.

[Johnhatton09]

I dont know what to do when i put in "GCC -o hello.c" but it says "bash: gcc: command not found" What do I do?

[gerbman]

I dont know what to do when i put in "GCC -o hello.c" but it says "bash: gcc: command not found" What do I do?

Install the 'build-essential' package.

[X.Cyclop]

sudo apt-get install build-essential

[bukwirm]

gcc has to be lowercase.

[coolyog]

i tried the same program but it gavve the following erroe
#include <stdio.h>

int main()
{
printf("Hello, world\n");
return 0;
}
error: stdio.h: No such file or directory
first.c: In function ‘main’:
first.c:6: warning: incompatible implicit declaration of built-in function ‘printf’

[gnusci]

i tried the same program but it gavve the following erroe
#include <stdio.h>

int main()
{
printf("Hello, world\n");
return 0;
}
error: stdio.h: No such file or directory
first.c: In function ‘main’:
first.c:6: warning: incompatible implicit declaration of built-in function ‘printf’

Did you try first?, if not, open a terminal and type:

> sudo apt-get install build-essential

after that youll be able to do:

> gcc first.c -o first

and then:

>./first