#include <iostream>

using namespace std;

const float RESIST = 10.0;   // resistance in ohms

// get the low voltage value from the user
float
getlow()
{
	float lowvoltage;
	cout << "Enter the lower voltage in volts ";
	cin >> lowvoltage;
	return lowvoltage;
} // getlow

// get the high voltage value from the user
float
gethigh()
{
	float highvoltage;
	cout << "Enter the higher voltage in volts ";
	cin >> highvoltage;
	return highvoltage;
} // gethigh

// check the ranges of the voltage values
bool
checkval(float highvoltage, float lowvoltage)
{
	if(lowvoltage < 0) {
		cout << "low voltage must be greater than 0" << endl;
		return(false);
	}

	if(highvoltage < 0) {
		cout << "high voltage must be greater than 0" << endl;
		return (false);
	}
	
	if (highvoltage < lowvoltage) {
		cout << "high voltage must be greater than low voltage" << endl;
		return (false);
	}
	return true; // everything is fine
} // checkval

int
main(int argc, char * argv[])
{
	float lowvoltage, highvoltage;
	float power, current;


	// get user input
	lowvoltage = getlow();
	highvoltage = gethigh();

	// check validity of input data
	if(checkval(highvoltage,lowvoltage) == false) {
		exit(1);
	}

	// calculate the table
	cout << "Voltage" << "\t" << "Power" << "\t" << "Current" << endl;
	for(float v = lowvoltage; v <= highvoltage; v++) {
		power = (v * v) / RESIST;
		current = v/RESIST;
		cout << v << "\t" << power << "\t" << current << endl;
	}

	return 0;
} // main