Struct array to function on a header file.

[Gainborought]

Hello,

I just can't make my code work.

I need to pass a struct to a .h file.

Here is my main:

#include "calculos.h"
#include "auxiliar.h"

struct dados{
    int idade;
    char sexo;
    int periodo;
    float coeficiente;
    float nota;
    float frequencia;
    int preparacao[6][5];
    int regencia[6][5];
    int regencia2[5][5];
    int apoio[7][5];
    int extraclasse[4][5];
    int integracao[6][5];
    int sugestao[300];
};



int main(){
    struct dados *usuario;


    //just a bunch of working code that alloc,fill and print the array of struct dados


    calculos(k,usuario);
    system("pause");
    return 0;
}


END_OF_MAIN();

and I have a calculos.c file, with.

#include<stdlib.h>


void calculos(int size, struct dados *usuario){


    int i,a;
    for(i=0;i<size;i++){
        a=usuario[i].idade;//i get an error right here
    }
}

and calculos.h

void calculos(int tamanho, struct dados *usuario){}

ERROR

||=== Build: Debug in hiltão2 (compiler: GNU GCC Compiler) ===|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c|3|warning: 'struct dados' declared inside parameter list [enabled by default]|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c|3|warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c||In function 'calculos':|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c|7|error: invalid use of undefined type 'struct dados'|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c|7|error: dereferencing pointer to incomplete type|
C:\Users\Juscelino\Desktop\hiltao2\calculos.c|5|warning: variable 'a' set but not used [-Wunused-but-set-variable]|
||=== Build failed: 2 error(s), 3 warning(s) (0 minute(s), 0 second(s)) ===|

[jimblumberg]

Well first an .h file shouldn't have any executable code. Perhaps the structure definition should be in the .h file and the function in another .c file.


Jim

[Gainborought]

Thank you Jim, anyway, this code didn't work in a calculos.c as well.

[jimblumberg]

Why not? Show your modified code and the complete error messages.

Jim

[Gainborought]

Well, I fixed my topic, at least now I've learned what .h are for, but stll need to learn how to use them correctly.
Above is the code and error, still on array

[jimblumberg]

It doesn't look like you moved the structure definition into the header file, before the function prototype. Once you do that and #include the header in both main and your other function you should be closer.

Also in the future please don't alter the code in your previous post, create a new post with the modified source. Changing your previous posts make this topic hard to follow.

Jim

[Gainborought]

Ok, thank you Jim,I had some problems to figure how to make it work but its done now.
Thank you a lot for your tips. Thanks to it I can continue with my lessons.