Thread: compile error

i dont know whats wrong

public class prgmTWO
{
	public static void main(String [] args)
	{
		double P = Input.getInt("How much have you deposited?"); 
		double i = Input.getInt("What is your annual interest rate?"); 
		i /= 100;
		double n = Input.getInt("How many years will it be in the bank?");
		double s; 
	    double invoke = bank(P, n, i, s);
	    System.out.println(invoke);
	}	    
	    public static double bank(double P, double n, double i, double s)
	    {
	    	double para = 1 + i;
	    	double intrest = Math.pow(para, n);
	    	s = P * intrest;
	    	return s;
	    }
}

Does that code compile? if not, and you can't understand the compiler messages, post them and someone is sure to explain what they mean.

It would be a very good plan to change your code to use standard Java coding conventions. Classes begin with a capital letter an variables with a lowercase one. Variables should be descriptive using camelCase where needed. So, eg, if you wanted a variable to stand for the amount of money deposited principal would be better than P, an interest rate is more clearly denoted with interestRate than with i.

wats "Input" in here......
post ur entire code.....

input.class?

heres the errorScreen Shot 2013-01-11 at 1.39.01 PM.jpg
sorry its small

Last login: Mon Jan 7 11:11:36 on ttys000
petes-MacBook-Air:~ pkrasinski$ cd java\ programs/
petes-MacBook-Air:java programs pkrasinski$ javac prgmTWO.java
prgmTWO.java:10: variable s might not have been initialized
double invoke = bank(P, n, i, s);
^
1 error
petes-MacBook-Air:java programs pkrasinski$

--- Update ---

the arrow is under the "s"

i got it to work
new code

public class prgmTWO
{
	public static void main(String [] args)
	{
		double P = Input.getInt("How much have you deposited?"); 
		double i = Input.getInt("What is your annual interest rate?"); 
		i /= 100;
		double n = Input.getInt("How many years will it be in the bank?"); 
	    double invoke = bank(P, n, i);
	    System.out.println("Intrest earned = $ " + invoke);
	}	    
	    public static double bank(double P, double n, double i)
	    {
	    	double para = 1 + i;
	    	double intrest = Math.pow(para, n);
	    	double s = P * intrest;
	    	return s;
	    }
}

how do i get the output to be 2 decimals only?

new program

public class prgmONE // Peter Krasinski
{
	public static void main(String [] args)
	{
		int c = 0, f = 0;
		int c2 = cels(c, f);
		int which = Input.getInt("1 for Celsius, 2 for Fahrenheit"); 
		switch (which)
		{
			case 1: 
			f = Input.getInt("Degree Fahrenheit?");
			System.out.println(f + "F is " + c2 + "C");  
				break;
			case 2:
			c = Input.getInt("Degree Celsius?");
			System.out.println(c + "C is "  + "F"); 
				break;	
		}
	}
		public static int cels(int f,int c)
		{
			c = ((9/5) * (f + 32));
			return c;	
		}
}

don't know why its not returning the proper value from the cels method. im half way done and wanted to see if the cels method worked
maybe i should sleep on it, that usually works

Its sill not returning the proper value

public class prgmONE // Peter Krasinski
{
	public static void main(String [] args)
	{
		double c = 0, f = 0;
		double c2 = cels(c, f);
		int which = Input.getInt("1 for Celsius, 2 for Fahrenheit"); 
		switch (which)
		{
			case 1: 
			f = Input.getDouble("Degree Fahrenheit?");
			System.out.println(f + "F is " + c2 + "C");  
				break;
			case 2:
			c = Input.getDouble("Degree Celsius?");
			System.out.println(c + "C is "  + "F"); 
				break;	
		}
	}
		public static double cels(double f, double c)
		{
			double b = 9/5;
			c = b * (f + 32);
			return c;	
		}
}

i don't think its returning c

its 0 how do i change it

nvm i did 5/9. your right i get 1.0

gottcha so i should do it in the other program

--- Update ---

if i put 55 in for fahrenheit i get 57.6 (it should be 12.7)

public class prgmONE // Peter Krasinski
{
	public static void main(String [] args)
	{
		double c = 0, f = 0;
		double c2 = cels(c, f);
		int which = Input.getInt("1 for Celsius, 2 for Fahrenheit"); 
		switch (which)
		{
			case 1: 
			f = Input.getDouble("Degree Fahrenheit?");
			System.out.println(f + "F is " + c2 + "C");  
				break;
			case 2:
			c = Input.getDouble("Degree Celsius?");
			System.out.println(c + "C is "  + "F"); 
				break;	
		}
	}
		public static double cels(double f, double c)
		{
			double b = 9.0/5;
			c = b * (f + 32);
			return c;	
		}
}

i think cels method is pulling f as 0 not from the case 1