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  1. #1
    imran1991 is offline Member
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    Default Unresolved compilation problems:

    import java.util.Random;
    import java.util.*;

    public class rendom_number {

    /**
    Suppose you want to develop a program to let a first-grader practice addition. The program
    randomly generates two single-digit integers, number1 and number2, and displays to the student
    a question such as “What is 7+9 ”, as shown in the sample run. After the student types
    the answer, the program displays a message to indicate whether it is true or false.
    */
    public static void main(String[] args) {


    do{
    Random rand = new Random();

    int num1=rand.nextInt(10);
    int num2=rand.nextInt(10);


    int input,sum;

    Scanner in=new Scanner(System.in);

    System.out.print("What is "+num1 +"+"+num2 +"=");
    input=in.nextInt();

    sum=num1+num2;

    if(sum==input)
    {
    System.out.print("True");
    }
    else
    {

    System.out.print("False");
    }

    }while(sum != input);


    }

    }


    What is that error plz someone explane

    ....in last line while loop "sum" and "input" not excess ...error is "sum cannot be resolved to a variable
    input cannot be resolved to a variable"...

  2. #2
    JosAH's Avatar
    JosAH is online now Moderator
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    Default Re: Unresolved compilation problems:

    Don't declare the variables sum and input in the body of your do ... while loop, but declare them above the 'do' part of your loop.

    kind regards,

    Jos
    cenosillicaphobia: the fear for an empty beer glass

  3. #3
    imran1991 is offline Member
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