Learngin C

[ricanlinux]

Hey I am new to C and I am using an online tutorial just to play around and see how i do. well i wrote a little program like the tutorial said but it is not doing what it is suppose to. here is the out put:
rican-linux@debian:~/programs$ cat hello.c
#include < stdio.h>

void main()
{
printf("\nHello World\n");
}
rican-linux@debian:~/programs$ gcc hello.c
hello.c:1:20: error: stdio.h: No such file or directory
hello.c: In function ‘main’:
hello.c:5: warning: incompatible implicit declaration of built-in function ‘printf’
hello.c:4: warning: return type of ‘main’ is not ‘int’

any ideas?

[sinical]

Typos are the enemy

Code: Select all

#include < stdio.h> 

should be

Code: Select all

#include <stdio.h>

also make sure you have libc6-dev installed - recompile and see what else pops up

[ricanlinux]

i do have libc6-dev and i did that changbe and this is the out put:
rican-linux@debian:~/programs$ gcc -o hello hello.c
hello.c: In function ‘main’:
hello.c:4: warning: return type of ‘main’ is not ‘int’

[chealer]

rican-linux@debian:~/programs$ gcc -o hello hello.c
hello.c: In function ‘main’:
hello.c:4: warning: return type of ‘main’ is not ‘int’

That's normal, since your main is returning void rather than int.

[saline]

to get rid of that, declare main as:

int main()

typically you will see:

int main(int argc, char *argv[])

or similar.

[ricanlinux]

I did it and it worked!

[ricanlinux]

here is another issue i am throwing out there! i am using a text to learn C and it gave an example i tried to compile here is the example:

include <stdio.h>

/*
* Tell the compiler that we intend
* to use a function called show_message.
* It has no arguments and returns no value
* This is the "declaration".
*
*/

void show_message(void);
/*
* Another function, but this includes the body of
* the function. This is a "definition".
*/
main(){
int count;

count = 0;
while(count < 10){
show_message();
count = count + 1;
}

exit(0);
}

/*
* The body of the simple function.
* This is now a "definition".
*/
void show_message(void){
printf("hello\n");
}

and here is the output:
rican-linux@debian:~/programs$ gcc -o ex1-1 ex1-1.c
ex1-1.c:1: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
ex1-1.c: In function ‘main’:
ex1-1.c:25: warning: incompatible implicit declaration of built-in function ‘exit’
ex1-1.c: At top level:
ex1-1.c:32: warning: conflicting types for ‘show_message’
ex1-1.c:21: warning: previous implicit declaration of ‘show_message’ was here
ex1-1.c: In function ‘show_message’:
ex1-1.c:33: warning: incompatible implicit declaration of built-in function ‘printf’

any thoughts?

[sinical]

you are missing a '#' in front of hte include

like i said before.. typos are the enemy