Answer to Question #159140 in C++ for Kefilwe

Question

Students in Computer Science would like to understand the concept of Ohm’s law. You are  required to write an application that will allow them to calculate the relation between  Voltage, Current and Resistance using the formulas below.

Answer 1

#include <iostream>
using namespace std;
int main()
{
	float I, U, R;
	cout << "Enter R if you want to find the resistance, I if the current, and U if the voltage: ";
	char c;
	cin >> c;
	switch (c)
	{
	case 'R':
		cout << "Enter the current I: ";
		cin >> I;
		cout << "Enter the voltage U: ";
		cin >> U;
		break;
	case 'I':
		cout << "Enter the voltage U: ";
		cin >> U;
		cout << "Enter the resistance R: ";
		cin >> R;
		break;
	case 'U':
		cout << "Enter the current I: ";
		cin >> I;
		cout << "Enter the resistance R: ";
		cin >> R;
		break;
	}
	switch (c)
	{
	case 'R':
		cout << "Resistance R = "<<U/I<<endl;
		break;
	case 'I':
		cout << "Current I = " << U / R << endl;
		break;
	case 'U':
		cout << "Voltage U = " << R*I << endl;
		break;
	}
	return 0;
}