uKDfan - Online C++ Compiler & Debugging Tool

#include <iostream>
using namespace std;

int main() {
	double k;

	cout << "Enter the measure of the angle in degrees (0 < k < 180):";
	cin >> k;

	if (k <=0 or k >= 180) {
		cout << "Invalid input! Angle must be between 0 and 180 degrees." << endl;
	}
	else if (k < 90) {
		cout << "The angle is acute." << endl;
	}
	else if (k == 90) {
		cout << "the angle is right." << endl;
	}
	else {
		cout << "The angle is obtuse." << endl;
	}

	return 0;
}