public class BicycleGears {

 

public static void main(String[] argv)

 

{

double wheelRadius=0.0f;

float eftRadius=0.0f;

int frontSprocket=0;

int rearSprocket=0;

float pRadius=-0.0f;

double eftRadius1;

float ratio=0.00f;

 

 

//Prompt and read the number;

System.out.println ("Please enter the wheelRadius");

wheelRadius = UserInput.readDouble();

//produce an error message and end program

if(wheelRadius <= 0)

{

System.out.println("Error, invalid value");

System.exit(0);

}

//Prompt and read the number;

System.out.println("Please enter the frontSprocket");

frontSprocket = UserInput.readInt();

//produce an error message and end program

 

if(frontSprocket <= 0)

{

System.out.println("Error, invalid value");

System.exit(0);

}

//Prompt and read the number

System.out.println("Please enter the rearSprocket");

rearSprocket = UserInput.readInt();

//produce an error message and end program

if (rearSprocket <= 0)

{

System.out.println("Error, invalid value");

System.exit(0);

}

 

 

// calculation for radius

eftRadius1 = (wheelRadius*frontSprocket)/rearSprocket;

 

//print radius

 

----------------------------------error-----------------------------

do {

System.out.println("The effective radius for radius" + wheelRadius + "and sprockets" + frontSprocket + " and " + rearSprocket + " is " + eftRadius1 );

 

} while (eftRadius1 > 0);

System.out.println("The effective radius for radius" + wheelRadius + "and sprockets" + frontSprocket + " and " + rearSprocket + " is " + eftRadius1 );

eftRadius1--;

--------------------------error-----------------------------------------

its work fine & run up to zero value But its start my calculation from E.g ( The effective radius for radius 27.5 and sprockets 55 and 23 is 65.77 Right ) But its give me result from here

The effective radius for radius 27.5 and sprockets 55 and 23 is 42.77 ( Wrong )

 

 

//calculate and print ratio

ratio = eftRadius/pRadius;

System.out.println("ratio to previous " + ratio );

} // end of main

 

} // end class

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