C - Why doesn't pointers change the value until function stops working?-CodePudding

So i'm writing a snake game using arrays, and i have to change the values of the row and column, not create copies, therefore i'm using pointers.

int main(){

int row=0,column=0;

int *rowPtr;
   rowPtr=&row;
int *colPtr;
   colPtr=&column;

I need to change these variable's value, and also check if they're at the place i want. I have a function to create my snake on the gameboard, prototype was created too.

create_snake(&row,&column,row,column,2); //creating snake

the creating snake function is here, there are parameters for row and column also, so that i can use them on the array and do a checkup, but i also used pointers, so that i'll change row's and column's values before using the actual row and column

void create_snake(int *rowPtr,int *colPtr,int row,int column,int x){

pointerset(rowPtr,colPtr);

printf("%d %d",row,column);

if(board[row][column]==1){
  create_snake(rowPtr,colPtr,row,column,x);

}else if(board[row][column]==0){
    board[row][column]=x;

}else{
    create_snake(rowPtr,colPtr,row,column,x);
}

}

To give random numbers for row and column, there was another function.

void pointerset(int *rowPtr,int *colPtr){
*rowPtr=rand()%;
*colPtr=rand()d;
}

I've tried to see where the variable's value's change, therefore i used a

printf("%d %d",row,column);

When i use it in the function create_snake() it gives me 0 0 for row and column, when i use this printf under the function create_snake() in main, after function works and stops, it gives me random numbers i've created, rather than 0 0 but i need them to change when the function works. I simply couldn't solve where i failed using pointers.

I've created the function pointerset() because if i was simply writing

*rowPtr=rand()%;
*colPtr=rand()d;

to the function create_snake() it wasn't working.

CodePudding user response：

So here is the thing, *rowPtr gets the integer value of the pointer, while rowPTr doesnt( i guess gives memory adress? im not sure)

i removed the arguments in the function called row and column but instead used pointer for everything.

I thought i couldn't use pointers to check my board which is an array for their index, but i can simply type board[*rowPtr][*colPtr] and it works, i was writing without asteriks.