can someone explain what is going on inside the strcut? c++
struct Pos{
int x;
int y; // coordinates
Pos(const Pos &p, int dx=0, int dy=0){ *this = p; x+=dx;
y+=dy;}
Pos(int _x, int _y){ x=_x; y=_y; } //new location
bool operator<(const Pos & p) const { return (x < p.x) ||
(x==p.x && y < p.y); }
bool operator==(const Pos & p) const { return x==p.x &&
y==p.y; }
Pos(){x=-1;y=-1;}
};
//do comment if any problem arises
//You has to have some knowledge of object oriented
programming
// in order to fully understand this Code
#include <iostream>
using namespace std;
struct Pos
{
// coordinates
int x;
int y;
//this is constructor of structure Pos which takes
another Pos and assigns it to current Pos
//and then it takes one x and y value and increement x
and y of current pos by respective values
//of x and y
Pos(const Pos &p, int dx = 0, int dy = 0) { *this
= p; x += dx; y += dy;}
//this structure takes 2 values of x and y and
initialises
//x and y of current Pos object with those
values
Pos(int _x, int _y) { x = _x; y = _y; }
//this is overloaded operator < which returns true
if value of current x is <
//value of x in given Pos or if x are equal then
checks y
bool operator<(const Pos & p) const { return (x
< p.x) || (x == p.x && y < p.y); }
//this is overloaded == operator which returns true if
both x and y values of
//current and given Pos in arguments are equal
bool operator==(const Pos & p) const { return x ==
p.x && y == p.y; }
//this is default constructor which initialises x and
y with -1
Pos() {x = -1; y = -1;}
};
//demonstrating above struct
int main()
{
//initialises first with x=2 and y=3
Pos first(2, 3);
//this line initialises second = first, then
//increement x of second with 1 and y with also
1
Pos second(first, 1, 1);
//printing first Pos
cout << "Position of first Pos: \nx: " <<
first.x << "\ny: " << first.y << endl;
//printinf second Pos
cout << "Position of second Pos: \nx: " <<
second.x << "\ny: " << second.y << endl;
string isEaual = first == second ? "Yes\n" :
"No\n";
//printing if first is equal to second
cout << "Is first equal to second? " <<
isEaual;
string isless = first < second ? "Yes\n" :
"No\n";
//printing if first is equal to second
cout << "Is first less than second? " <<
isless;
}
Output:
can someone explain what is going on inside the strcut? c++ struct Pos{ int x; int...
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