6.19 C++ How to Program (8th Edition) By Paul Deitel, Harvey Deitel

(Hypotenuse Calculations) Define a function hypotenuse that calculates the hypotenuse of a right triangle when the other two sides are given. The function should take two double arguments and return the hypotenuse as a double. Use this function in a program to determine the hypotenuse for each of the triangles shown below.

Triangle Side 1 Side 2

1 3.0 4.02 5.0 12.03 8.0 15.0

Solution:

#include < iostream>
using std::cout;
using std::cin;
using std::endl;
 
#include < iomanip>
using std::setprecision;
using std:: fixed;
 
#include < cmath>
 
double calculateHypotenuse( double, double);
 
double side1;
double side2;
double hypotenuse;
 
int main()
{
    cout << "Hypotenuse of triangle 1 is " << fixed << setprecision( 2 )
        << calculateHypotenuse( 3.0, 4.0 ) << endl
        << "Hypotenuse of triangle 2 is " << calculateHypotenuse( 5.0, 12.0 ) << endl
        << "Hypotenuse of triangle 3 is " << calculateHypotenuse( 8.0, 15.0 ) << endl;
 
    return 0;
}
 
//calculate Hypotenuse function
double calculateHypotenuse( double side1, double side2 )
{
    hypotenuse = sqrt(side1 * side1 + side2 * side2);
    return hypotenuse;
}