Help In Last Question please

[MaryKerry]

Hello , I am newbie in the course of computer science, was learning algorithms with VisualG and passed to C + +, I started making a list of exercises of 10 questions, but I was unable to develop practically nothing this last question, I believe that for me this time the degree of difficulty is high, the teacher recommended to seek help on forums and books the question is as follows:

10º Write a program inventory that stores product information available. (int cod_prod, char name [20], float price, int quantity). For testing purposes, the program should store the information below from the keyboard. Data entry must end with a product code of zero.

example

1 TV 1000 5
2 RADIO 200 3
3 MICROWAVE 400 1


The system should have the functions of input, output. Consider using Struct.

[zerver]

Study the following topics, and you will be able to solve the exercise:

* Text input/output using cin/cout.
* class/struct for storing the data of each object
* containers (such as std::vector) for storing the set of objects
* control flow (loops based on while/for/do..while)

Regards

[2kaud]

I would suggest that before you start writing code that you first design the program - ie describe in English (or other natural language) how the program will work. Once you have the design, then code the program from the design.

define input requirements
define output requirements
detail any required algorithms (eg average etc)
detail any required data structures
do {
     produce program design
     produce pseudo-code if required or necessary
     code the progam from the design/pseudo-code
     test the program
     debug the program
} while program_not_working

For help with c++, you might find these sites useful
http://www.learncpp.com/
http://www.cplusplus.com/doc/tutorial/
http://www.tutorialspoint.com/cplusplus/index.htm

Once you have some code written, if you post it here then we'll be able to offer further guidance.

Good luck!

[MaryKerry]

So I got up here :/ , help please?

#include <cstdlib>
#include <iostream>

using namespace std;

struct stc_produto{
      int cod_prod; 
      char nome[20]; 
      float preco; 
      int quantidade; 
      }



stc_produto produto[50];
  
  

void menu (stc_produto prod){
  
  int opc;
  int i=1;
  
  printf("1- ENTRADA\n");
  printf("2- SAIDA\n"); 
  printf("3- SAIR\n"); 
  scanf("%i",opc);
  
  switch(opc){
              case 1:
                   while(i != 0){
          
          printf("Digite o codigo do produto ou 0(zero) para sair:\n");
          scanf("%d",prod[i].cod_prod);
          if (prod[i].cod_prod == 0){
             printf("Produto(s) Cadastrado(s) com Sucesso!");
             menu();
             }
             else{
                  printf("Digite o nome do produto:\n");
                  scanf("%d",prod[i].nome);
                  printf("Digite o preco do produto:\n");
                  scanf("%d",prod[i].preco);
                  printf("Digite a quantidade:\n");
                  scanf("%d",prod[i].quantidade);
                  i++;
                  }
             }
                   break;
              case 2:
                   printf("Digite o codigo do produto:\n");
                   scanf("%i",cod);
      
                   while i<=50 do{
            
                   if (cod == prod[i].cod_prod){
                           
                               
                  printf("Digite a quantidade:\n");
                  scanf("%d",prod[cod].quantidade);
                  
                  menu();
                  
                                    
             }  else
                    i++;  
                    
                    }        
                   break;
              case 3:
                   system("PAUSE");
                   break;
}
  
}

int main(void)
{
  
  menu();
  
    
    
    
    
}

[VictorN]

So I got up here :/ , help please?

What problem do you have with this code?

[2kaud]

Are you coding in c or c++ - as the way you have coded input/output is c-type code and not the c++ way of doing it. In c++ you would usually use the cin/cout streams for input and output. See http://www.cplusplus.com/reference/iostream/

Also you have menu() calling menu() if the entered product code is 0 which is probably not what you want. You probably want a loop iteration rather than recursion?

Also rather than using char arrays (eg name[20]) it would be more usual in c++ to use the STL class string http://www.cplusplus.com/reference/string/

What further help do you want with this code?