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/*
Program prompts user to enter two points in the form (x1, y1) and (x2, y2) and finds the distance between the two points using a function.
Algorithm steps:
1. Define a function called findDistance (...) that takes four parameters x1, y1 and x2, y2 as two points.
a. finds the distance between them using the equation: sqrt//FIX ME sqrt symbol ((x2-x1)^2 + (y2-y1)^2)
b. returns the calculated distance value
2. Prompt user to enter four numbers
3. Convert the values into float and store them into variables
4. Call function getDistance by passing 4 entered numbers as arguments
5. Display results with proper description. Format output numbers to 2 decimal points.
6. Test and validate that program output is correct for a given set of input points.
7. Bonus - (10 points) Using a loop repeat step 2-6 until the user wants to quit.
*/
#include <iostream>
#include <cstdio>
#include <cassert>
#include <cmath>
using namespace std;
const double epsilon = 1e-6; // 0.000001 accuracy upto 6 decimal points
// function prototypes
// function that calculates the distance between two points
// x1, y1 and x2, y2 and returns the calculated value double findDistance (int, int, int, int);
// test function that runs automated testing void test();
double findDistance(int x1, int y1, int x2, int y2)
{
cout << sqrt((x2 - x1) ^ 2 + (y2 - y1) ^ 2) << endl;
//FIXME - Find the distance between (x1, y1) and (x2, y2)
// following the algorithm step 1
// return the calculated distance
return 0.000000;
}
void test()
{
assert(findDistance(4, 3, 5, 1) - 2.23607 <= epsilon);
assert(findDistance(3, 5, 7, 0) - 6.40312 <= epsilon);
assert(findDistance(-1, 2.03, 4, 18) - 16.73442 < epsilon);
// FIXME - add atleast two more test cases
cout << "all tests passed..." << endl;
}
int main()
{
int x1, y1, x2, y2; // variables to store two points (x1, y1) and (x2, y2)
char ch;
//FIX ME - 10 bonus points - add loop until the user wants to quit
system("cls");
cout << "Program calculates distance between 2 points on a 2d Coordinates." << endl;
cout << "Enter a point in the form (x, y) : ";
// parse the input stream
cin >> ch >> x1 >> ch >> y1 >> ch; // value stored in ch is ignored
printf(" (x1, y1) = (%d, %d)\n", x1, y1);
cout << "Enter a second point in the form (x, y): ";
cin >> ch >> x2 >> ch >> y2 >> ch; // value store in ch is ignored
printf(" (x2, y2) = (%d, %d)\n", x2, y2);
//FIXME - Read/parse the second point and store data into variables x2 and y2 //fixed
test();
//FIXME - Call test function // fixed
findDistance(x1, y1, x2, y2);
//FIXME - call findDistance function passing proper arguments //
printf("The distance between the 2 points = ", findDistance);
//FIXME - using printf function display the returned distance with proper description
cin.ignore(1000, '\n');
cout << "Good Bye!" << endl;
cin.get();
return 0;
}
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