Question

I would like to know, how to loop through a array of int to get its value and set its value. I know how to use the for loop to to get instantly, but I am not sure how it works, when I am using in user created objects and esp using the get set method.

I am totally new to this and have very little guidance from my lectures. I hope you guys can assist to help me. This up to where I have done.

//point.h

class point {
private:
    int x[4];

public:
    int getx();
    void setx();
};  

//point.cpp

class point {
   point::getx(){
      // ??????
   }

   point::setx(){
      // ???????
   }

//main.cpp

 int main(){
     point objPoint;
     objPoint.setx(/* ???? */);
     ???? = objPoint.getx();
 }

Answer 1

First of all, your getx method should return int*, not just int, and your setx should receive const int* as parameter. Second, in your point.cpp file you shouldn’t redeclare class point.

int* point::getx() { //version with copying
    int* ans = new int[4];
    for (int i = 0; i < 4; i++) {
        ans[i] = x[i];
    }
    return ans;
}

void point::setx(const int* y) {
    for (int i = 0; i < 4; i++) {
        x[i] = y[i];
    }
}

Then you can use them like this

int y[4] = {1, 2, 3, 4};
int* z;
objPoint.setx(y);
z = objPoint.getx();

Just don’t forget to delete[] z when you’re done.