Question

Write a C++ program that reads a number and determines whether the number is positive, negative or zero using Switch operator method

Answer 1

#include <iostream>

using namespace std;

template <typename T> int sgn(T val) {

return (T(0) < val) - (val < T(0));

}

int main()

{

cout << "Enter a number: ";

int number;

cin >> number;

switch (sgn(number)) {

case -1: cout << "The number is negative";

break;

case 0: cout << "The number is zero";

break;

case 1: cout << "The number is positive";

break;

}

}

Step-by-step explanation:

You need the special sgn() function because a switch() statement can only choose from a list of discrete values (cases).