71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Champlain College SDEV-340-81
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*
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* C++ Week 10: Assignment (second semester) - Starting out with C++ Early Objects (9 Edition) (2020/07/19)
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* Exceptions, Templates, and the Standard Template Library (STL)
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* Exceptions - Chapter 16 (Page 1034)
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* Programming Challenge (2. Arithmetic Exceptions)
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* A Function that throw an exception when a integer that is passed in not perfect square
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* Written by Llewellyn van der Merwe <llewellyn.vandermerw@mymail.champlain.edu>, July 2020
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* Copyright (C) 2020. All Rights Reserved
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* License GNU/GPL Version 2 or later - http://www.gnu.org/licenses/gpl-2.0.html
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include <iostream>
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#include <cmath>
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using namespace std;
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// To check if a number is perfect square without finding square root
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// Taken from
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// https://www.geeksforgeeks.org/check-if-a-number-is-perfect-square-without-finding-square-root/
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bool isPerfectSquare(int n) {
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for (int i = 1; i * i <= n; i++) {
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// If (i * i = n)
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if ((n % i == 0) && (n / i == i)) {
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return true;
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}
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}
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return false;
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}
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// Get the square root of a number
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int getSquareRoot(int n) {
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// only if it is perfect
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if (isPerfectSquare(n)) {
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// return square root
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return sqrt(n);
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}
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throw " is not a perfect square";
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}
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int main() {
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// instantiate the numbers
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int n, r;
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// get a number from the user
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cout << " To get the square root" << endl;
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cout << " **********************" << endl;
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cout << " Enter a number: ";
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cin >> n;
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// try this out
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try {
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// get the square root
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r = getSquareRoot(n);
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// print out the square root
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cout << " Square root of " << n << " is " << r << endl;
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}
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// check if we have a catch
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catch (char const* &m) {
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// a very basic error message
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cout << " " << n << m << endl;
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}
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return 0;
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}
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