Thread: I need help making a simple math game in java.?

Task: Make a game where the computer asks you 10 questions of random numbers either added, subtracted, multiplied, or division/modulus. Have it return the amount of questions you got right. and how long it took.

Here is my code:

/**
A stopwatch accumulates time when it is running. You can 
repeatedly start and stop the stopwatch. You can use a
stopwatch to measure the running time of a program.
*/
public class Stopwatch
{ 
/**
Constructs a stopwatch that is in the stopped state
and has no time accumulated.
*/
public Stopwatch()
{ 
reset();
}
 
/**
Starts the stopwatch. Time starts accumulating now.
*/
public void start()
{ 
if (isRunning) return;
isRunning = true;
startTime = System.currentTimeMillis();
}
 
/**
Stops the stopwatch. Time stops accumulating and is
is added to the elapsed time.
*/
public void stop()
{ 
if (!isRunning) return;
isRunning = false;
long endTime = System.currentTimeMillis();
elapsedTime = elapsedTime + endTime - startTime;
}
 
/**
Returns the total elapsed time.
@return the total elapsed time
*/
public long getElapsedTime()
{ 
if (isRunning) 
{ 
long endTime = System.currentTimeMillis();
return elapsedTime + endTime - startTime;
}
else
return elapsedTime;
}
 
/**
Stops the watch and resets the elapsed time to 0.
*/
public void reset()
{ 
elapsedTime = 0;
isRunning = false;
}
 
private long elapsedTime;
private long startTime;
private boolean isRunning;
}
______________________________________…
import java.util.Scanner;
import java.util.Random;
public class Mathgame {
 
 
 
public void addition(){
int count=0;
Scanner number = new Scanner(System.in);
for(int question=0; question<10; question++){
Random generator = new Random(19580427);
Random generator2 = new Random(19580427);
int r = generator.nextInt();
int q = generator2.nextInt();
System.out.println("Question 1. " + r + " + " + q + "?");
int answer = number.nextInt();
if(answer ==(r+q))
{
count++;	
}
}
 
}
public void subtract(){
int count=0;
Scanner number = new Scanner(System.in);
for(int question=0; question<10; question++){
Random generator = new Random(19580427);
Random generator2 = new Random(19580427);
int r = generator.nextInt();
int q = generator2.nextInt();
System.out.println("Question 1. " + r + " - " + q + "?");
int answer = number.nextInt();
if(answer ==(r-q))
{
count++;	
}
}
}
 
 
public void Multiplication(){
int count=0;
 
Scanner number = new Scanner(System.in);
for(int question=0; question<10; question++){
Random generator = new Random(19580427);
Random generator2 = new Random(19580427);
int r = generator.nextInt();
int q = generator2.nextInt();
System.out.println("Question 1. " + r + " X " + q + "?");
int answer = number.nextInt();
if(answer ==(r*q))
{
count++;	
}
}
 
}
 
public void Modulus(){
int count=0;
Scanner number = new Scanner(System.in);
for(int question=0; question<10; question++){
Random generator = new Random(19580427);
Random generator2 = new Random(19580427);
int r = generator.nextInt();
int q = generator2.nextInt();
System.out.println("Question 1. " + r + " / " + q + "?");
int answer = number.nextInt();
if(answer ==(r%q))
{
count++;	
}
}
}
 
 
}
______________________________________
import java.util.Scanner;
public class MathgameRunner {
 
public static void main(String[] args) {
int x=1;
while(x>0){
System.out.println("Choose a game to Play!");
Scanner test=new Scanner(System.in);
String choice = test.nextLine();
 
 
if(choice=="addition"){
 
}
if(choice=="subtraction"){
 
 
}
if(choice=="multiplication"){
 
}
if(choice=="modulus"){
 
}
else
{
System.out.println("Invalid Choice!");
}
 
 
 
}
 
}
 
}

This is incomplete because I can not figure out what to put in the Mathgamerunner.java

Welcome to javaprogrammingforums.com!

To allow us to help you, you will want to edit your post and add [code] [/code] tags around your code (check out the FAQ) and you will want to ask an answerable question since I don't see any specific question yet in your post above.

Best of luck!