COIN TOSSING: Write a program that simulates the toss of a coin. Provide a menu

Question

COIN TOSSING: Write a program that simulates the toss of a coin. Provide a menu of two options: toss and quit. Count the number of times each side of the coin appears and display the results after each toss. The program should have a method called flip() that is called, takes no arguments and returns a Coin enum value (HEADS or TAILS).

This is my code it runs but the problem is the part of display the results after each toss it only do it when I exit the program and shows the summary. I want to do both display every single toss head or tails and when I choose show results the summary. The only part need to be added is the display the results after each toss.

My code:

import java.io.*;
import java.util.Random;
public class tosscoinpgm
{
public static void main (String args[])
{
  
try
{   
int choice = 1,tails = 0,heads = 0;
   boolean frntvalue;
  
//user input for different choice
BufferedReader b = new BufferedReader(new InputStreamReader(System.in));
//creating object of class so that we can access flip method
   tosscoinpgm obj = new tosscoinpgm();
do
{
   System.out.println(" Enter your choice");
   System.out.println(" 1 Toss Coin ");
System.out.println(" 2 Show Results");
   choice = Integer.parseInt(b.readLine());//reading choice of user using readline() method

   if (choice == 1)
   {
   frntvalue = obj.flip();//flip method return boolean value true or false

   if (frntvalue == true)//if condition check fro true or false

       {
       heads++;
       }
       else if (frntvalue == false)
       {
       tails++;
       }
   }
else if (choice == 2)
       {
       System.out.println(" No.Of Heads = "+heads);
       System.out.println(" No.Of Tails = "+tails);
       }
   }
while (choice != 2);

   }
catch (Exception e)
{
System.out.println("Error"+e.getMessage());
}

}
  

boolean flip ( )
{
   int front;
  
   Random randnum = new Random();

   front = 1 + randnum.nextInt( 2 );

   if (front == 1)
   {
   return true;
   }
   else if (front == 2)
   {
   return false;
   }
return true;
  
}   
}

Explanation / Answer

Hi

I have added the code for your requirement. Highlighted the code changes below

tosscoinpgm.java

import java.io.*;
import java.util.Random;
public class tosscoinpgm
{
public static void main (String args[])
{
  
try
{   
int choice = 1,tails = 0,heads = 0;
boolean frntvalue;
  
//user input for different choice
BufferedReader b = new BufferedReader(new InputStreamReader(System.in));
//creating object of class so that we can access flip method
tosscoinpgm obj = new tosscoinpgm();
do
{
System.out.println(" Enter your choice");
System.out.println(" 1 Toss Coin ");
System.out.println(" 2 Show Results");
choice = Integer.parseInt(b.readLine());//reading choice of user using readline() method

if (choice == 1)
{
frntvalue = obj.flip();//flip method return boolean value true or false
if (frntvalue == true)//if condition check fro true or false
{
System.out.println("Head");
heads++;
}
else if (frntvalue == false)
{
   System.out.println("Tail");
tails++;
}
}
else if (choice == 2)
{
System.out.println(" No.Of Heads = "+heads);
System.out.println(" No.Of Tails = "+tails);
}
}
while (choice != 2);
}
catch (Exception e)
{
System.out.println("Error"+e.getMessage());
}

}
  

boolean flip ( )
{
int front;
  
Random randnum = new Random();
front = 1 + randnum.nextInt( 2 );
if (front == 1)
{
return true;
}
else if (front == 2)
{
return false;
}
return true;
  
}   
}

Output:

Enter your choice
1 Toss Coin
2 Show Results
1
Tail
Enter your choice
1 Toss Coin
2 Show Results
1
Tail
Enter your choice
1 Toss Coin
2 Show Results
1
Head
Enter your choice
1 Toss Coin
2 Show Results
1
Head
Enter your choice
1 Toss Coin
2 Show Results
1
Tail
Enter your choice
1 Toss Coin
2 Show Results
2
No.Of Heads = 2
No.Of Tails = 3

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