Multiplying In Java

[Mist]

Down to 4 errors

Fixed the math but no matter what i do dataIn.readline(); refuses to do its stuff

import java.io.*;

 

public class Change

{

public static void main(String[]args) throws IOException

{

 

BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

 

//Declaring Variables

double quarters;

double dimes;

double nickels;

double pennies;

double total;

 

//Taking it straight from the horses mouth

System.out.println("How many Quarters do you have?");

quarters = dataIn.readline();

System.out.println("How many Dimes do you have?");

dimes = dataIn.readline();

System.out.println("How many Nickels do you have?");

nickels = dataIn.readline();

System.out.println("How many Pennies do you have?");

pennies = dataIn.readline();

 

//Adding up the cash

quarters = (quarters*0.25);

dimes = (dimes*0.10);

nickels = (nickels*0.05);

pennies = (pennies*0.01);

total = quarters + dimes + nickels + pennies;

 

//Projecting it to the world

System.out.println("You have" + "$" + total);

}// public static void main

}//public class Change

[syneze]

because readLine is for strings

you need readInt() or readDouble()

[Mist]

thx lol comp teacher is a good teacher but believes we need to figure this out on our own (too much of a noob to know and we dont have books as this is a transition year)

 

Edit didnt work Im using doubles but it gives the same error

 

Lets see best guess it should be dataIn.readline(); becuase it is taking info from the users input but it doesnt wok. Then i tried readln instead of using the full line and still nothing.

 

Made it so that it would read the lines and convert them back to doubles but no such luck.

 

/*

Project: Calculates the ammount of money a person's change is worth

 

ProjectName: Change

 

Mailbox: Change

*/

 

import java.io.*;

 

public class Change

{

public static void main(String[]args) throws IOException

{

 

BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

 

//Declaring Variables

double coins1; //quarters

double coins2;//dimes

double coins3;//nickels

double coins4;//pennies

double allCoins;//sum of coins

String strCoins1;

String strCoins2;

String strCoins3;

String strCoins4;

String strAllCoins;

 

//Taking it straight from the horses mouth

System.out.println("How many Quarters do you have?");

strCoins1= dataIn.readline(); //gets ammount of quarters

System.out.println("How many Dimes do you have?");

strCoins2= dataIn.readline(); //gets ammount of dimes

System.out.println("How many Nickels do you have?");

strCoins3= dataIn.readline(); //gets ammount of nickels

System.out.println("How many Pennies do you have?");

strCoins4= dataIn.readline(); //gets ammount of pennies

 

//Converting

coins1 = Double.parseDouble(strCoins1);

coins2 = Double.parseDouble(strCoins2);

coins3 = Double.parseDouble(strCoins3);

coins4 = Double.parseDouble(strCoins4);

 

//Adding up the cash

coins1 = (coins1*0.25); //multiplying by to get value of quarters

coins2 = (coins2*0.10);//multiplying to get value of dimes

coins3 = (coins3*0.05);//multiplying to get value of nickels

coins4 = (coins4*0.01);//multiplying to get value of pennies

allCoins = coins1 + coins2 + coins3 + coins4; // adds up all the values to get the total

 

//Projecting it to the world

System.out.println("You have" + "$" + allCoins); //displays users money

}// public static void main

}//public class Change

[slugbug3311]

This should work for you i got it to work you just needed some things fixxed up

 

 

//Project: Calculates the ammount of money a persons change is worth

 

//ProjectName: Change

 

//Mailbox: Change

 

import java.io.*;

 

public class Change

{

public static void main(String[]args) throws IOException

{

 

BufferedReader dataIn = new BufferedReader(new InputStreamReader(System.in));

 

//Declaring Variables

double coins1; //quarters

double coins2;//dimes

double coins3;//nickels

double coins4;//pennies

double allCoins;//sum of coins

String strCoins1;

String strCoins2;

String strCoins3;

String strCoins4;

String strAllCoins;

 

//Taking it straight from the horses mouth

System.out.println("How many Quarters do you have?");

strCoins1= dataIn.readLine(); //gets ammount of quarters

System.out.println("How many Dimes do you have?");

strCoins2= dataIn.readLine(); //gets ammount of dimes

System.out.println("How many Nickels do you have?");

strCoins3= dataIn.readLine(); //gets ammount of nickels

System.out.println("How many Pennies do you have?");

strCoins4= dataIn.readLine(); //gets ammount of pennies

 

//Converting

coins1 = Double.parseDouble(strCoins1);

coins2 = Double.parseDouble(strCoins2);

coins3 = Double.parseDouble(strCoins3);

coins4 = Double.parseDouble(strCoins4);

 

//Adding up the cash

coins1 = (coins1*0.25); //multiplying by to get value of quarters

coins2 = (coins2*0.10);//multiplying to get value of dimes

coins3 = (coins3*0.05);//multiplying to get value of nickels

coins4 = (coins4*0.01);//multiplying to get value of pennies

allCoins = coins1 + coins2 + coins3 + coins4; // adds up all the values to get the total

 

//Projecting it to the world

System.out.println("You have" + "$" + allCoins); //displays users money

}// public static void main

}//public class Change

[Mist]

thx xlug but i figured it out yesterday. I made an applet version and still ran into trouble so went back to what i was doing and figured it out.