Can you please explain the solution with comments Thanks You are to complete the
ID: 3597921 • Letter: C
Question
Can you please explain the solution with comments
Thanks
You are to complete the implementation of code that represents a line in a two-dimensional plane. The skeleton of the code is given to you below. The code uses pointers and structs. Namely, the declarations of the two structures, struct point and struct line, are provided to you. You will need to complete the implementation of the function create_line. Here are the requirements:
create_line takes four parameters, representing the x and y coordinates of the end point 1 and the X and Y coordinates of the end point 2. This function should dynamically allocate memory space to represent the line and points. You have to use struct line and struct point to represent the line and point.
In create_line, you are not allowed to declare any additional variables other than p and q. In addition, you cannot use p in the code you write, i.e., you can only use q in your code.
At the end of create_line, all of the dynamically allocated memory space has to be deleted. That is, at the end of create_line, there should be no memory leak.
create_line should output one line:
Where srcX, srcY, dstX, dstY are coordinate values of the two points.
You do not need to worry about any error handling. For example, you do not need to
check that the input values are valid coordinates.
An example invocation ofcreate.ine is provided in the main function. This line will cause create line to output: "The line is from C2,3) to (7,8). struct point t int x int *y 1i struct line t struct point x; struct point y: 3: Page 17 of 20 void create line (int srcx, int srcY, int dstx, int dsty) f struct 1ine p; struct line **q = &p; ; /t write your code here. Remember, you cannot use p, int main O create-li ne(2, 3 , 7 , 8) ; return 0;Explanation / Answer
#include <iostream>
#include <cstdlib>
using namespace std;
struct point {
int *x, *y;
};
struct line {
struct point *x;
struct point *y;
};
void create_line(int srcX, int srcY, int dstX, int dstY) {
struct line *p;
struct line **q = &p;
*q = new line;
(*q)->x = new point;
(*q)->x->x = new int(srcX);
(*q)->x->y = new int(srcY);
(*q)->y = new point;
(*q)->y->x = new int(dstX);
(*q)->y->y = new int(dstY);
cout << "The line is from (" << srcX << "," << srcY << ") to (" << dstX << "," << dstY << ")." << endl;
}
int main() {
create_line(2,3,7,8);
return 0;
}