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benoitstjean
Joined: 30 Oct 2007
Posts: 566
Location: Ottawa, Ontario, Canada
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| Display comma separated value in fprintf [DONE] |
 Posted: Tue Oct 13, 2020 1:54 pm |
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Compiler: 5.026
Device: PIC24EP512GP806
Hi guys,
Quick question: I have an int64 variable and I am currently printing it as-is on a serial monitor like this example:
int64 CardSize = 3931151360;
fprintf( MONITOR_SERIAL, "{%Ld bytes}", CardSize );
This works, output is {3931151360 bytes}.
Is there a a way to get the output to have the commas like this:
{3,931,151,360 bytes}
Thanks.
Ben
Last edited by benoitstjean on Wed Oct 14, 2020 12:59 pm; edited 1 time in total |
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temtronic
Joined: 01 Jul 2010
Posts: 9245
Location: Greensville,Ontario
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| Posted: Tue Oct 13, 2020 2:36 pm |
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Quick answer...
Convert to a string, then insert commas 'somehow'.
I'll try something later....too nice down here near Hamilton to be INSIDE.
Jay |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19546
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| Posted: Wed Oct 14, 2020 12:11 am |
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You don't say whether you need to handle signed values?.
However this (for +ve values), should return a string containing the
digits with commas added.
| Code: |
char *outputcommas(int64 n)
{
static char retbuf[30];
char *p = &retbuf[sizeof(retbuf)-1];
int i = 0;
*p = '\0';
do {
if(i%3 == 0 && i != 0)
*--p = ',';
*--p = '0' + n % 10;
n /= 10;
i++;
} while(n != 0);
return p;
}
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temtronic
Joined: 01 Jul 2010
Posts: 9245
Location: Greensville,Ontario
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| Posted: Wed Oct 14, 2020 4:49 am |
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I assumed they're all +ve numbers based on the variable named 'CardSize'
hmm, my brute force method I did last night didn't show up ! grr....
also have NO hot water in the house either, GRRRRRRRR...
that's TWO things gone wrong so far and the sun's not up yet.
Jay
4th try...
| Code: |
unsigned int32 x=4294967294;
char mystring[20];
char nustring[20]= "0,123,456,789";
lcd_gotoxy(1,2);
printf(lcd_putc,"test %Lu",x);
sprintf(mystring,"%Lu",x);
lcd_gotoxy(1,3);
printf(lcd_putc,mystring);
nustring[0]=mystring[0];
nustring[1]=',';
nustring[2]=mystring[1];
nustring[3]=mystring[2];
nustring[4]=mystring[3];
nustring[5]=',';
nustring[6]=mystring[4];
nustring[7]=mystring[5];
nustring[8]=mystring[6];
nustring[9]=',';
nustring[10]=mystring[7];
nustring[11]=mystring[8];
nustring[12]=mystring[9];
lcd_gotoxy(1,4);
printf(lcd_putc,nustring);
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benoitstjean
Joined: 30 Oct 2007
Posts: 566
Location: Ottawa, Ontario, Canada
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| Posted: Wed Oct 14, 2020 5:05 am |
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ok, thanks both of you.
Have a nice day.
Ben |
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