Thread: ASSIGNMENT HELP

@myjava okay i'll try your code out! thanks man

--- Update ---

Originally Posted by Norm

Did you try it to see what the results are? Write two lines of code to do the subtract and print out the results.

//Start the process
 
		char c1 = SIN.charAt(1);
		char c2 = SIN.charAt(3);
		char c3 = SIN.charAt(5);
		char c4 = SIN.charAt(7);
		int num1 = c1-0;
		num1 = c1*2;
		System.out.println(num1);

i've tried subtracting it by 0 and '0'
i get 112 every time

Originally Posted by Norm

When you learned arithmetic, what was said about how a value change when you subtracted 0 from it?

the teacher was absent that day and we were expected to learn the lesson ourselves!
so what do you think i should do? subtract it by 0 after the if (num1>9) or before?

Originally Posted by Norm

As I said several times before, one way to convert a digit char to an int value is to subtract '0' from it. For example: '3' - '0' = 3

okay it works now, but how would i throw this all into a loop. i don't get how i would be able to set up a for loop and have it check if each number doubled is greater than 9 and then individually add them together.. help please?

char c1 = SIN.charAt(1);
		char c2 = SIN.charAt(3);
		char c3 = SIN.charAt(5);
		char c4 = SIN.charAt(7);
		int num1 = c1-'0'; //This will get a integer value for a character
		num1 = num1*2;
		int num2 = c2-'0';
		num2 = num2*2;
		int num3 = c3-'0';
		num3 = num3*2;
		int num4 = c4-'0';
		num4 = num4*2;
 
		if (num1>9){
		System.out.println(num1);
		int num1_1 = (num1%10) + (num1/10);
		}

Originally Posted by Norm

Does the code now completely check a SIN to be correct?

yeup! i finally got it to work, but I'm having one last problem..
the program is supposed to keep running until 999999999 is entered

so if i create a while loop for example:

while (SIN!=999999999) {
<entire code here>
}


it would keep running infinitely, if i choose to prompt again at the end of the code i would have to change the while loop variable and thus making it not work.

i've tried your format of
loop
get sin
check sin
end loop
but i cant seem to get the variables set

Originally Posted by Norm

My example was very simple and didn't show any tests to end the loop. a test would need to be added after the SIN was read to check for the request to end the loop and the loop exited there. A break statement is one way to exit a loop.

yeup, i finally got the damn thing to work. thanks for your help norm. much appreciated man.