need help with a homework problem and i've been starring at code all day and my brain is fried... any advice or pointers would be greatly appreciated

Description of the Problem
Write a method minimum3 that returns the smallest of three floating-point numbers. Use the Math.min method
to implement minimum3. Incorporate the method into an application that reads three values from the user, determines
the smallest value and displays the result.

// Lab 1: Min.java
// Program finds the minimum of 3 numbers
import java.util.Scanner;

public class Min
{
// find the minimum of three numbers
public void findMinimum()
{
Scanner input = new Scanner( System.in );

double one; // first number
double two; // second number
double three; // third number

System.out.printf( "%s\n   %s\n   %s\n",
"Type the end-of-file indicator to terminate",
"On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
"On Windows type <ctrl> z then press Enter" );
System.out.print( "Or enter first number: " );

while ( input.hasNext() )
{
one = input.nextDouble();

/* Write code to get the remainder of the inputs and
convert them to double values */
two = input.nextDouble();
three = input.nextDouble();

/* Write code to display the minimum of the three floating-point numbers */
System.out.printf("Minimum is: %f ",  minValue);
System.out.printf( "\n%s\n   %s\n   %s\n",
"Type the end-of-file indicator to terminate",
"On UNIX/Linux/Mac OS X type <ctrl> d then press Enter",
"On Windows type <ctrl> z then press Enter" );
System.out.print( "Or enter first number: " );
} // end while
} // end method findMinimum

// determine the smallest of three numbers
/* write the header for the minimum3 method */
public void minimum3()
{
double x;
double y;
double z;
double minValue;

minValue = x;

if (minValue > y)
minValue = y;

if (minValue > z)
minValue = z;
// determine the minimum value
return minValue; /* Write code to compute the minimum of the three numbers
using nested calls to Math.min */
} // end method minimum3
} // end class Min

Edited by MisterSinyster: n/a

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Last Post by jon.kiparsky

I don't see anything obviously wrong except the missing semi after the return statement and the fact that you're not using Math.min - what is the problem you're having?

Edited by jon.kiparsky: n/a

compiler errors
line 32 - cannot find symbol : variable minValue
line 58 - cannot return a value whose result type is void

also i've never used math.min. could you give an example possibly?

Thanks, that helps.

line 32 - you're referring to a variable that doesn't exist at this point. minValue is local to the minimum3 method. You'll fix that by fixing that method to return a value, and then using that value.

line 58 - minimum3 is declared to return no value. Change "void" to "double" and you'll be required to return a value. Once you've done that, replace "minValue" at line 32 with the call to that method:

System.out.printf("Minimum is: %f ",minimum(one, two, three));

As for math.min, it's a function of two arguments and it returns the lesser of the two. For more information, look at the API documentation for the Math class.

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