面向对象的优点

可能重复:
What's the point of OOP?

举个简单的例子:

struct vector_t {
  int x, y, z;
}

void setVector(vector_t *vector, int _x, int _y, it _z) {
  vector->x = _x;
  vector->y = _y;
  vector->z = _z;
}

vector_t addVector(vector_t* vec1, vector_t* vec2) {
  vector_t vec3;
  vec3.x = vec1->x + vec2->x;
  // and so on...
  return vec3;
}

现在,我对面向对象编程还不太熟悉,但上面的内容可以转化为面向对象编程:

class vector_t {
private:
  int x, y, z;
public:
  void set(int _x, int _y, int _z) { ... };
  int getX() { return x; }
  // ...
  void addVector(vector_t *vec) { ... };
  // ...
};