Thread: Recursion problem part 2...help

Hi;

I have a linked list working but now the problem is to calculate the total of products i have using recursion.

So my problem is here.

Code:

#include <stdio.h>
#include <stdlib.h>


typedef struct loja{
    char marca[100];
    char car[10];
    int stock;
    float preco;
}INFO;


typedef struct elem
{
    INFO nodo;
    struct elem *Prox;
}ELEM;


int insElectrodomestico(INFO info, ELEM **initlista)
{
    ELEM *novo, *aux;
    novo=(ELEM*) malloc(sizeof(ELEM));
    if(novo==NULL)
    {
        printf("Erro na lista");
        return -1;
    }
    novo->nodo=info;//O que se criar novo pertence a estrutura info
    novo->Prox=NULL;//O proximo elemente fica NULL
    if(*initlista==NULL)
    {
        *initlista=novo;//Se for NULL inicia a lista
        return 0;
    }
    aux=*initlista; //Inicia a lista atraves do aux
    while(aux->Prox!=NULL) //Enquanto que aux->prox seja diferente de NULL
    {
        aux=aux->Prox; //aux vai receber aux->prox
    }
    aux->Prox=novo; //Deixa preparado novo, para receber valor de aux->novo
return 0;
}

//My main problem is here
//I read the list, then if the stock is <1, quit
//else, i read the stock, and use recursion
int totEletrodomesticos(INFO info,ELEM *initlista)
{
    ELEM *aux;
    aux->nodo=info;
    aux->Prox=NULL;
    if(aux==NULL)
    {
        printf("Lista vazia...");
        exit(1);
    }
    if(info.stock<1)
    {
        return -1;
    }
    else
    {
        return(info.stock+totEletrodomesticos(info.stock-1));
    }
}




int main()
{
    ELEM *initlista=NULL;  // ---Declarar um aponta para o primeiro elemento da lista
    INFO info; //Chama a lista
    int op;
    do
    {
        printf("Quer registar: 1- SIM, 0-NAO \n");
        scanf("%d", &op);
        getchar();
        printf("Brand: \n");
        gets(info.marca); 
        printf("Class: \n");
        gets(info.car);
        printf("Stock: \n");
        scanf("%d", &info.stock);
        getchar();
        printf("Price: \n");
        scanf("%f", &info.preco);
        getchar();
        insElectrodomestico(info,&initlista);
        totEletrodomesticos(info, &initlista);
    }
    while(op!=0);
    return 0;
}

I have all this errors caused by recursion function



error: incompatible type for argument 1 of 'totEletrodomesticos'|
note: expected 'INFO' but argument is of type 'int'|
error: too few arguments to function 'totEletrodomesticos'|
D:\2012\c_exe\Pergunta 3 b\main.c|42|note: declared here|
In function 'main':|
warning: passing argument 2 of 'totEletrodomesticos' from incompatible pointer type [enabled by default]|
D:\2012\c_exe\Pergunta 3 b\main.c|42|note: expected 'struct ELEM *' but argument is of type 'struct ELEM **'|
In function 'totEletrodomesticos':|


||=== Build finished: 5 errors, 2 warnings ===|

Honestly...i'm lost

Hi Matticus

Thanks, i saw that and o took out

totEletrodomesticos(info, &initlista);

to

totEletrodomesticos(info, initlista);

but still have 4 errors

D:\2012\c_exe\Pergunta 3 b\main.c||In function 'totEletrodomesticos':|
D:\2012\c_exe\Pergunta 3 b\main.c|58|error: incompatible type for argument 1 of 'totEletrodomesticos'|
D:\2012\c_exe\Pergunta 3 b\main.c|42|note: expected 'INFO' but argument is of type 'int'|
D:\2012\c_exe\Pergunta 3 b\main.c|58|error: too few arguments to function 'totEletrodomesticos'|
D:\2012\c_exe\Pergunta 3 b\main.c|42|note: declared here|
||=== Build finished: 4 errors, 0 warnings ===|



Well, one by one

58|error: incompatible type for argument 1 of 'totEletrodomesticos'|
Is this line

return(info.stock+totEletrodomesticos(info.stock-1));

note: expected 'INFO' but argument is of type 'int

int totEletrodomesticos(INFO info,ELEM *initlista)

All the error are in thos lines, for instance, it says too few arguments but in the main function i just have to pass, info and initlista, so why there is a error there??

Fixed

Code:

int totEletrodomesticos(ELEM *initlista)
{
    if(initlista==NULL) return 0;
    return (initlista->nodo.stock+totEletrodomesticos(initlista->Prox));
}

Excellent - it's working now?

Yes, i wasn't thinking well about what data i should looking for, he can't be just livros->stock since i'm working with a variable aux.

Thanks