In C language

- Create main with an array of 5 points, reads in 4 points from the user by calling getLabel() 4 times.

- Display the gap or distance between the 1st and 2nd points, and 3rd and 4th points using function gap.

- Display the slope of the line between the 1st and 2nd points, and the 3rd and 4th points using function slope.

- Create a 5th point by calling perpLabel() using 1st and 2nd points.

Code is provided below

#include #include #include #include

struct mark_struct { double xaxis; double yaxis; char tag[25]; }; typedef struct mark_struct Point;

Point getLabel(); // get a point from the user(stdin)

double gap(Point mk1, Point mk2); // returns the distance between mk1 and mk2

double slope(Point mk1, Point mk2); /* finds slope of the line at mk1 going to mk2 */

void perpLabel (Point mk1, Point mk2, Point *mk3); /* calculate mk3 such that a line from mk1 to mk3 is perpendicular to the line from pt1 to mk2 */

int main() { Point aArray[5];

//finish main

return 0; }