krepta at juno.com (krepta at juno.com) wrote:
> For what seems like a VERY long time now, I have been trying to create,
> with my very limited programming knowledge and skill, a QBasic program
> that could convert Decimal numbers to Binary,
#include <stdio.h>
#include <stdlib.h>
void reverse (char *);
int main (int argc, char *argv[]) {
int n = atoi(argv[1]);
char s[33], *s1 = s;
while (n) {
*s1 = (n & 0x01) ? '1' : '0';
s1++;
n >>= 1;
}
*s1 = '\0';
reverse(s);
puts(s);
return 0;
}
void reverse (char *s) {
char *t = s;
while (*t) t++;
t--;
while (s < t) {
char c = *s;
*s = *t;
*t = c;
s++;
t--;
}
}
> and vice versa.
#include <stdio.h>
int main (int argc, char *argv[])
{
int n = 0;
char *s = argv[1];
while (*s) {
n = (n << 1) + (*s == '1');
s++;
}
printf ("%d\n", n);
return 0;
}
> I gave up
> on that project, but, I figured out how to program an XL Spreadsheet to
> do the conversions for me. :) For some reason I was unable to make the
> embeded IF statements go any deeper than 8 levels.
Eight-level nested IF statements? Oh my. I really do *not* want to
see that.
> So, I had to put the
> HEX converters on one set, and the OCT converters on another.
I'll leave the base 16 and base 8 versions as exercises for the reader.
And the QBasic port too.
--
Greg Wooledge | "Truth belongs to everybody."
greg at wooledge.org | - The Red Hot Chili Peppers
http://wooledge.org/~greg/ |
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