It's not simple for a novice programmer. :)
> -----Original Message----- > From: Dennis [mailto:[EMAIL PROTECTED] > Sent: Friday, January 31, 2003 5:45 AM > To: [email protected] > Subject: Re: Adding Commas > > > On Thu, 30 Jan 2003, stormpunk wrote: > > > I made one up real quick, I see no problems. > > > > -- > > >test commas > > 1:1 > > 1200:1,200 > > 10200:10,200 > > -10200:-10,200 > > 123123123:123,123,123 > > 2123123123:2,123,123,123 > > -2123123123:-2,123,123,123 > > Stormpunk, there's a small bug in your code with 3, 6, and 9 digit > negative numbers. > -100:-,100 > -100000:-,100,000 > -100000000:-,100,000,000 > > > > I was bored and decided to write my own functions to do this. > > The first one does pretty much the same thing as stormpunk's: > let sprintf format the number, then stick commas in it. > > The second one does all the number to string conversion itself, > adding in commas during the process. > > These functions have the same usage as stormpunk's. > > Who said this wasn't simple? :) > > > Dennis > > > > char * comma(long d, char * buf) > { > char buf1[14]; > int len; > int i = 0, j = 0; > > /* convert the number to a string */ > len = sprintf(buf1, "%ld", d); > > /* copy any leading - over */ > if (buf1[0] == '-') > { > buf[i++] = buf1[j++]; > } > > /* Copy the first digit */ > buf[i++] = buf1[j++]; > > while (j < len) > { > /* insert a , if necessary */ > if (((len - j) % 3) == 0) > buf[i++] = ','; > > /* copy one digit */ > buf[i++] = buf1[j++]; > } > > /* NUL terminate the string */ > buf[i] = '\0'; > > return buf; > } > > char * comma(long d, char * buf) > { > int i = 0; > long base = 1000000000; > int digits = 10; > > /* take care of negative numbers */ > if (d < 0) > { > buf[i++] = '-'; > d *= -1; > } > > /* take care of 0 */ > if (d == 0) > buf[i++] = '0'; > > /* no leading 0's */ > while (base > d) > { > base = base / 10; > digits--; > } > > while (base >= 1) > { > /* Get one number */ > buf[i++] = d / base + '0'; > > /* Update the variables */ > d %= base; > base = base / 10; > --digits; > > /* add in the , for thousands */ > if ((digits % 3) == 0 && digits > 0) > buf[i++] = ','; > } > > /* NUL terminate the string */ > buf[i] = '\0'; > > return buf; > } > > > > -- > ROM mailing list > [email protected] > http://www.rom.org/cgi-bin/mailman/listinfo/rom >
