// Program untuk menentukan jenis gelombang

/*  Programmer  : William Handi Wijaya      Tanggal diselesaikan : 22 November 2019
    NRP         : 05111940000087            Kelas                : Dasar Pemograman C */

#include<stdio.h>

double get_double(void);
void klasifikasi(double a);

int main(void)
{
    //variable declarations
    double input; // input - user's wavelength
    //looping program
        //get the value of wavelength and displays it
    printf("Enter the wavelength -> ");
    input = get_double();
    while(input!=0)
    {
        klasifikasi (input);
        printf("Enter the wavelength -> ");
        input == get_double();
    }
    printf("Program ends.");
    return 0;
}

void klasifikasi(double a)
{
    if(input<=3E-11)
    {
        printf("It is gamma ray.\n"); //displaying
    }
    else if (input<=3E-9)
    {
        printf("It is X-ray.\n"); //displaying
    }
    else if(input<=4E-7)
    {
        printf("It is Ultraviolet.\n"); //displaying
    }
    else if(input<=7E-7)
    {
        printf("It is visible.\n"); //displaying
    }
    else if(input<=1.4E-5)
    {
        printf("It is infrared.\n"); //displaying
    }
    else if(input<=0.1)
    {
        printf("It is microwave.\n"); //displaying
    }
    else
    {
        printf("It is radio wave.\n"); //displaying
    }
}

double get_double(void)
{
    double a;
    scanf("%lf", &a);
    return a;
}