Structure Segmentation Fault

[GouSan]

I am having a little trouble with my structure, since I can't give it any values.

Here is the structure:

typedef struct TPacote {
	unsigned int pos_bola[2];
	unsigned int pos_jogadores_nossos[5][2]; //[ID][posx, posy]
	unsigned int dir_jogadores_nossos[5][1]; //[ID][angulo em graus]
	unsigned int pos_jogadores_deles[5][2]; 

	//Marcacao do campo
	//Mundo e campo: sup_dir, sup_esq, inf_esq e inf_dir
	unsigned int pos_mundo[4][2];
	unsigned int pos_campo[4][2];
	//Meio campo: sup e inf
	unsigned int pos_meio_campo[2][2];
	//Gol: sup e inf
	unsigned int pos_gol_0[2][2];
	unsigned int pos_gol_1[2][2];
} Pacote;

Now, i want to give it values, like this:

Pacote *pack;

pack->pos_bola[0] = 1;
pack->pos_bola[1] = 2;
pack->pos_jogadores_nossos[0][0] = 3;
pack->pos_jogadores_nossos[0][1] = 4;
pack->pos_jogadores_nossos[1][0] = 5;
pack->pos_jogadores_nossos[1][1] = 6;
pack->pos_jogadores_nossos[2][0] = 7;
pack->pos_jogadores_nossos[2][1] = 8;
pack->pos_jogadores_nossos[3][0] = 9;
pack->pos_jogadores_nossos[3][1] = 10;
pack->pos_jogadores_nossos[4][0] = 11;
pack->pos_jogadores_nossos[4][1] = 12;
pack->dir_jogadores_nossos[0][0] = 13;
pack->dir_jogadores_nossos[1][0] = 14;
pack->dir_jogadores_nossos[2][0] = 15;
pack->dir_jogadores_nossos[3][0] = 16;
pack->dir_jogadores_nossos[4][0] = 17;
pack->pos_jogadores_deles[0][0] = 18;
pack->pos_jogadores_deles[0][1] = 19;
pack->pos_jogadores_deles[1][0] = 20;
pack->pos_jogadores_deles[1][1] = 21;
pack->pos_jogadores_deles[2][0] = 22;
pack->pos_jogadores_deles[2][1] = 23;
pack->pos_jogadores_deles[3][0] = 24;
pack->pos_jogadores_deles[3][1] = 25;
pack->pos_jogadores_deles[4][0] = 26;
pack->pos_jogadores_deles[4][1] = 27;

Them, I compile and everything is okay, but when I run, I get a Segmentation Fault error. Where is it?

See ya!

GouSan

[MacGyver]

You declared a pointer to a struct.... and then you tried messing with whatever it pointed to. Where do you think the pointer is pointing to?

Hint: Not valid memory.

[hk_mp5kpdw]

Your pointer isn't pointing anywhere specific. The address stored in pack is just whatever random value that happens to be there and then you attempt to dereference that random address. You need to new some space for pack first before you use it... or point it somewhere valid.

[Elysia]

Hint: new/delete.

[iMalc]

Given that you obviously don't yet know about dynamically allocating memory, I suspect you perhaps just want to declare an instance of this object as a global or local variable. In that case, just remove the * and use a dot . instead of an arrow ->.