undeclared?

[CrazyJo82]

Hi, I'm new... I gave up months back when I tried to do C but I'm giving a 2. nd go at it. However, I've ran into the same problem... I'm using Osborne McGraw-Hill...

Could some some tell me and then explain why it's an error? I'm using Dev-C++

#include "stdio.h"

main()
{
      func2()
      printf("3 ");
}

func2()
{
       func1()
       pfintf("2 ");
}

func1()
{
       printf("1 ");
}

- 'func2' undeclared (first use this function)
-`;' before "printf"
- ISO C++ forbids declaration of `func2' with no type
and so on...

#include "stdio.h"

main()
{
      one();
      two();
}

one()
{
     printf("The summer solider, ");
}

two()
{
     printf("the sunshine patriot.");
}

this one is one the exercise but the same "undeclared" comes up as well... I checked the answer and that's the answer.

It's so fustrating that I copied exactly what the book said and it's still an error

Thanks for any help.

[Spook]

Firstly, you should have return types specified for your functions. one() and two() ought to be void, and main should return an int - usually "0" or EXIT_SUCCESS.

Second, one() and two() need function prototypes so that the compiler knows that they're there. They look like...

return-type function-name(type, type);

As you'll notice, very similar to the top of a function itself, it just lacks a code block. In the specific case of one() it would look like...

void one(void);

Try making those fixes, ought to compile without a peep.

[DJMaze]

PHP Code:

#include "stdio.h"

void one();
void two();

int main()
{
      one();
      two();
}

void one()
{
     printf("The summer solider, ");
}

void two()
{
     printf("the sunshine patriot.");
} 


A function must be declared before you use it

[kyoryu]

Alternately, if you have your main() function after one() and two(), it will also work... by the time main() is compiled, the compiler will have already seen one() and two(), and so it will work.

#include "stdio.h"

void one()
{
     printf("The summer solider, ");
}

void two()
{
     printf("the sunshine patriot.");
}

int main()
{
      one();
      two();
}