how to split a number?

[david43]

hi,all
I have a integer 59.
how to split to two integer
my code not work

			buf=recebuf;            	
	     buf = buf % 10;
           
			lcd_write_char(10,1,buf);   	
		
	 buf = buf / 10;            	
			lcd_write_char(11,1,buf);

 

[betwixt]

Just a guess because I'm not sure which processor or compiler you are using: 'buf' appears to be a number of some type, is your lcd_write_char routine expecting a character like it's name suggests?
You might have to convert the number to it's ASCII equivalent or use 'sprintf' to turn it into a string.

Brian.

 

[T3STY]

Get a look here:
https://www.edaboard.com/blog/1784/
In the comments I have posted a function that would return the C string of the number, which can be used to be printed on LCDs.

 

[jayanth.devarayanadurga]

I think you have to convert it into character after extractingg individual digits like

digit1 = buf / 10 + 0x30;
digit2 = buf % 10 + 0x30;

or

digit1 = buf / 10 + 48;
digit2 = buf % 10 + 48;

 

[th_sak]

Try this code:

        uc digit1, digit2, number;

	number = 59;
	digit1 = (number/10)%10;	//digit1 = 5
	digit2 = (number%10);		//digit2 = 9

	lcd_putc(digit1 + 0x30);	//0x05+0x30=0x35 -->ASCII '5'
	lcd_putc(digit2 + 0x30);	//0x09+0x30=0x39 -->ASCII '9'

 

[rohitkhanna]

You are modifying the value in 'buf' with your first statement 'buf = buf %10'

Instead you should use some temp variable so that buf doesn't get modified.

Also - i assume that the first argument in lcd_write_char() is the position from the left ? If so, the you need to swap the 2 position numbers 10 <--> 11.
10 is on the left (most sig digit) and 11 on the right.

Lastly - the earlier comment about converting to ascii code is valid. You need to add 48 (0x30) to convert to ascii codes, unless your lcd_write routine already does this (which it probably doesn't)