Initialising a vector of object pointers

[Danik]

Hi,
I have a problem when I try to make a vector with pointers to objects of my class Ball.

The line that generates an error is the fourth line below.

Ball b1(50,70);
Ball b2(100,200);

vector<Ball*> bVect;

bVect.push_back(&b1);

The error I get is
error C2143: syntax error : missing ';' before '.'
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
error C2371: 'bVect' : redefinition; different basic types

I am just starting to learn c++ and I can't find the answer in any of my material or online.

Thanks

[jsmith]

You have a problem elsewhere in your code. It appears you've defined the "bVect" somewhere above there and that is causing all the problems.

[Danik]

Thanks for the reply.

Here is the complete code of the class, this is all in main.cpp before the main function.

#include "main.h"
#include <vector>

using namespace std;

class Ball
{
public:
	Ball(float x, float y);
	float x,y,xv,yv;
	int r,c;                        //radius and color
};

Ball::Ball(float X, float Y) {
	x = X;
	y = Y;
	xv = 1;
	yv = 1;
	r = 20;
	c = 2;
}

Ball b1(50,70);
Ball b2(100,200);

vector<Ball*> bVect;

bVect.push_back(&b1);

It looks like I could have been mistaken and the error pointed to the line
bVect.push_back(&b1);

It does now anyhow. If I comment the line out, the program compiles.

Edit:
Looks like I cannot declare or access the vector outside the main function, but if i declare it inside of main() I can access it there.

But I want it to be global so I can access it from my update() function.

Do I need to pass a reference to the vector each time I call update() ?

[helios]

You can't call functions (such as std::vector::push_back()) from global scope. Only functions (such as main()) may call functions.

[Danik]

I see, thanks!