/* * File: point.c * ------------- * This program tests the functions defined for the type pointT. */#include <stdio.h>#include "genlib.h"#include "strlib.h"#include "simpio.h"/* * Type: pointT * ------------ * This structure represents a point in the x/y plane. */typedef struct {    double x, y;} pointT;/* Private function declarations */pointT CreatePoint(double x, double y);void DisplayPoint(pointT p);pointT AddPoint(pointT p1, pointT p2);/* Main program */main(){    pointT p1, p2;    pointT origin;    origin = CreatePoint(0, 0);    p1 = CreatePoint(2, 3);    p2 = CreatePoint(4, 3);    printf("AddPoint(p1, p2) = ");    DisplayPoint(AddPoint(p1, p2));    printf("\n");}pointT CreatePoint(double x, double y){    pointT p;    p.x = x;    p.y = y;    return (p);}void DisplayPoint(pointT p){    printf("(%g, %g)", p.x, p.y);}pointT AddPoint(pointT p1, pointT p2){    pointT p;    p.x = p1.x + p2.x;    p.y = p1.y + p2.y;    return (p);}