(Sides of a Triangle) Write a program that reads three nonzero double values and deter- mines and prints whether they could represent the sides of a triangle.

Question

What will be an ideal response?

Answer 1

```
// Determine whether three values could represent the sides of a triangle.
#include
using namespace std;

int main()
{
double side1; // length of side 1
double side2; // length of side 2
double side3; // length of side 3
bool isTriangle = false; // whether the sides can form a triangle

// get values of three sides
cout << "Enter side 1: ";
cin >> side1;

cout << "Enter side 2: ";
cin >> side2;

cout << "Enter side 3: ";
cin >> side3;
// test if the sides can form a triangle
if ( side1 + side2 > side3 )
{
if ( side2 + side3 > side1 )
{
if ( side3 + side1 > side2 )
isTriangle = true;
} // end inner if
} // end outer if

// display result
if ( isTriangle )
cout << "These could be sides to a triangle." << endl;
else
cout << "These do not form a triangle." << endl;
} // end main
```