Code

#include <iostream>
using namespace std;

int main()
{
double frequency, wavelength;
char choice;
cout <<"Do you want to input Frequency 'f' or Wavelength 'w' ?" << endl;
cin >> choice;
switch (choice)
{
case 'f':
cout << "input frequency /n";
cin >> frequency;

if (Frequency <= 0.000000003)
cout <<"This is a Radio wave, it has a wavelength of over one nanometer";
else if (Frequency >= 3000000000)
	cout <<"This is a Microwave. It has a wavelength between 0.010 meters and 1 meter";
else if (Frequency >= 300000000000)
	cout <<"This is infrared radiation. It has a wavelength between 70 micrometers and 10 millimeters";
else if (Frequency >= 400000000000000)
	cout <<"This is visible light, it has a wavelength betwixt 40 micrometers and 70 micrometers";
else if (Frequency >= 750000000000000
	cout <<"This is ultraviolet radiation and has a wavelength between 100 micrometers and 40 micrometers";
else if (Frequency >= 30000000000000000)
	cout <<"This is x-ray radiation and has a wavelength between 100 nanometers and 100 micrometers";
else if (Frequency >= 30000000000000000000)
	cout <<"This is gamma radiation and has a wavelength below 100 micrometers";
break;
case 'w':
cout << "input Wavelength";
cin >> Wavelength;
if (Wavelength >= 1)
	cout <<"This is a Radio wave, it has a Frequency under 3 nanohertz";
else if (Wavelength <=1)
	cout <<"This is a Microwave. It has a frequency of above 3 nanohertz and below 300 nanohertz";
else if (Wavelength <= 0.010)
	cout <<"This is infrared light, it's frequency is betwixt 300 nanoHertz and 400 picoHertz";
else if (Wavlength <= 0.0000007)
	cout <<"This is visible light, it's frequency is betwixt 400 picoHertz and 750 picoHertz";
else if (Wavlength <= 0.0000004)
	cout <<"This is an ultraviolet ray, it's frequency is betwixt 750 picoHertz and 30 femtoHertz";
else if (Wavlength <= 0.00000010)
	cout <<"This is an x-ray, it's frequency is betwixt 30 femtoHertz and 30 attoHertz";
else if (Wavlength <= 0.00000000010)
	cout <<"This is a gamma ray, it's frequency is above 30 attoHertz";
break;
default: cout << "Invalid entry" << endl;
}
	return 0;
}