BSD 3 development

[unix-history] / usr / src / libc / gen / rin.c

#include <stdio.h>

rin()
{
       double d;
       register n, c, f;

       d = 0.;
       f = 0;
       n = 0;
loop:
       c = getchar();
       if(c == EOF)
               exit();
       if(c == '-') {
               f++;
               goto loop;
       }
       if(c == '.') {
               n++;
               goto loop;
       }
       if(isdigit(c)) {
               if(n)
                       n++;
               d = d*10.+c-'0';
               goto loop;
       }
       if(f)
               d = -d;
       for(f=1; f<n; f++)
               d /= 10.;
       n = d;
       return(n);
}