VS2005 bug!! or not...

hi

I'm working on a C++ project and i'm using VS2005 win32 console.

What i'm trying to do is, draw a soccer field and place 5 players of each team in there field area. Nothing wrong here (i think).

The problem is then i run the project. There are no compile errors, but when the soccer field appears on the win32 console it only shows 3players and not 5.
But the funny thing (well...not so funny) is when i do a debug, the soccer field appears on the win23 console with all the 5players :-S

why does that happen?

Anyway, i tryed something like this:

The order of placing the players on the field was:
1. Goal Keeper
2. Defender 1
3. Defender 2
4. Forwarder 1
5. Forwarder 2

And i mixed up that order with something like this:
4.
1.
3.
5.
2.

And now all the players appear on the field :-S

Can anyone help me with this "bug" ?

It's most probably not a bug.

You must be relying on dangling pointers, uninitialized variables, or something like that somewhere.

Go through your code and make sure that you're not doing something stupid.

The debugger will let you view your array so you know what is going on. Set a breakpoint during the display of your soccer field array and examine the array in the debugger. You can also mouse over the array name in the editor and the debugger will stick a drop down so you can browse the array. As well you can mouse over other variables in question.

Sure, we can help you. How would you like us to proceed?

Set the compiler to Warning Level 4 for a start.

It's true this was a disaster in VC6, but at least Microsoft have cleaned up all their headers in the .net compilers to allow the maximum warning level to be used effectively.

I agree with noodles, look for uninitialised things first.

hi guys! thanks for the help...

I'm not using pointers, and i checked for uninitialized variables. The only variable that wasn't initialized was a string and even so i gave it a initial value, but the problem continues :(

At first i thought that the problem was something related to the players coordinates, because i'm using a random function to place them on the field. So i did a debug to see if the players were overlapped. But everything on the array was correct, all the players were on the right place. And the prof of that was shown at the last debug breakpoint when viewing the field on the console.

By the way, how do i set the compiler to Warning Level 4 to give it a try?

hi once again...

I said earlier that the problem was resolved by initializing some variables, but it wasn't the case. I still had the player insertion orders altered, so i thought the problem was solved :(

In other words...problem continues :confused:

Try to remove unnecessary code a little at a time until you get a small amount of code that still produces the same problem. Then post that code.

function that inserts the players on the field:

Code:

---

int num = 0;
        string nEq1 = "Sporting", nEq2 = "Porto", idJogador;
        campo c1;
        ponto p;
       
                c1.eq1.setNome(nEq1);

                c1.eq1.setNomeMCampo("esquerdo");
                c1.eq2.setNomeMCampo("direito");

                //player1
                idJogador = nEq1.at(0);
                idJogador += "1";
                guardaRedes r1(1,0,0,idJogador);
                c1.eq1.insere(r1);

                p = r1.posicaoVaga(c1.campoJogo, c1.eq1.getNomeMCampo());
                r1.setPosL(p.x);
                r1.setPosC(p.y);
                c1.campoJogo[r1.getPosL()][r1.getPosC()]=r1.getID();
               
                //player2
                idJogador = nEq1.at(0);
                idJogador += "2";
                defesa d2(2,0,0,idJogador);
                c1.eq1.insere(d2);

                p = d2.posicaoVaga(c1.campoJogo, c1.eq1.getNomeMCampo());
                d2.setPosL(p.x);
                d2.setPosC(p.y);
                c1.campoJogo[d2.getPosL()][d2.getPosC()]=d2.getID();

                //player3
                idJogador = nEq1.at(0);
                idJogador += "3";
                defesa d3(3,0,0,idJogador);
                c1.eq1.insere(d3);

                p = d3.posicaoVaga(c1.campoJogo, c1.eq1.getNomeMCampo());
                d3.setPosL(p.x);
                d3.setPosC(p.y);
                c1.campoJogo[d3.getPosL()][d3.getPosC()]=d3.getID();

                //player4
                idJogador = nEq1.at(0);
                idJogador += "4";
                atacante a4(4,0,0,idJogador);
                c1.eq1.insere(a4);

                p = a4.posicaoVaga(c1.campoJogo, c1.eq1.getNomeMCampo());
                a4.setPosL(p.x);
                a4.setPosC(p.y);
                c1.campoJogo[a4.getPosL()][a4.getPosC()]=a4.getID();

                //player5
                idJogador = nEq1.at(0);
                idJogador += "5";
                atacante a5(5,0,0,idJogador);
                c1.eq1.insere(a5);

                p = a5.posicaoVaga(c1.campoJogo, c1.eq1.getNomeMCampo());
                a5.setPosL(p.x);
                a5.setPosC(p.y);
                c1.campoJogo[a5.getPosL()][a5.getPosC()]=a5.getID();

---

if i change the order of insertion, the players will all appear in the field.


random function (different random value for each player type)

Code:

---

ponto atacante::posicaoVaga(string campJogo[20][37],string nomeCampo)const
{
        int posL = 0, posC = 0;

        srand ((unsigned) time (NULL));
        posL = rand () % 20;
        posC = rand () % 6;
        ponto p;

        while (campJogo[posL][posC] != "  ")
                if (campJogo[posL][posC] == "  ")
                        break;
                else
                {
                        srand ((unsigned) time (NULL));
                        posL = rand () % 20;
                        posC = rand () % 6;
                }

        if (nomeCampo == "esquerdo")
        {
               
                p.x = posL;
                p.y = 17 - posC;
        }
        else if (nomeCampo == "direito")
        {
                p.x = posL;
                p.y = 18 + posC;
        }
        return p;
}

---

What am i doing wrong? (to not say stupid...):confused:

These 3 lines are redunadant. Your program will work the same if you delete them:

Code:

---

                if (campJogo[posL][posC] == "  ")
                        break;
                else

---

This line

Code:

---

        srand ((unsigned) time (NULL));

---

should not be in that function. It should only ever be called once in your program. This means that line should be shifted to 'main'. Please read the FAQ about this.

Quote:

---

Originally Posted by iMalc

This line

Code:

---

        srand ((unsigned) time (NULL));

---

should not be in that function. It should only ever be called once in your program. This means that line should be shifted to 'main'. Please read the FAQ about this.

---

I hope you allow me to be pedantic for a bit, since this most likely outside of the scope of the what the OP is doing.

srand() might need to be called once per thread. I think this is system specific, however, and some systems require it once per process and others require it once per thread. Fun stuff no doubt.

The problem was on the srand ((unsigned) time (NULL));
I removed it from all the player functions, and now it's only called once on the main function.

Thanks allot iMalc!
I really thought that i needed to call the srand() every time i used rand() :rolleyes: