/***************************************************
Computing Slopes
Write a program that reads values x1,y1,x2,y2 and
prints out the slope of the line passing through
(x1,y1) and (x2,y2). The slope is given by:
slope = (y1 - y2) / (x1 - x2)
For the purists among you, you may assume that the
line is not vertical.
***************************************************/
**#include <iostream>**
**using** **namespace** std;
**int** main()
**{**
// Read first point
**double** x1;
cout << "Enter x1: ";
cin >> x1;
**double** y1;
cout << "Enter y1: ";
cin >> y1;
// Read second point
**double** x2;
cout << "Enter x2: ";
cin >> x2;
**double** y2;
cout << "Enter y2: ";
cin >> y2;
// Compute the slope
**double** slope;
slope = (y1 - y2) / (x1 - x2);
// Print out slope
cout << "The slope is: ";
cout << slope << endl;
**return** 0;
**}**