HI,
I got an issue, when I did compile a project on my mac with the function "dtostrf" it did work, now I swithced to a windows PC and now I get this error.
/tmp/713292119/sketch_sep21a/sketch_sep21a.ino: In function 'char* dtostrf(double, int, unsigned int, char*)':
/tmp/713292119/sketch_sep21a/sketch_sep21a.ino:30:7: error: 'fcvt' was not declared in this scope
exit status 1
Has anyone an idea why that happen? I tride yesterday to set up the arduino on an raspberry and there I got the same issu.
Thanks.
this is the code which I use:
/*
*/
#include <string.h>
#include <stdlib.h>
#include <math.h>
void setup() {
}
void loop() {
}
#if 0
char *dtostrf (double val, signed char width, unsigned char prec, char *sout) {
char fmt[20];
sprintf(fmt, "%%%d.%df", width, prec);
sprintf(sout, fmt, val);
return sout;
}
#else
char *dtostrf(double val, int width, unsigned int prec, char *sout)
{
int decpt, sign, reqd, pad;
const char *s, *e;
char *p;
s = fcvt(val, prec, &decpt, &sign);
if (prec == 0 && decpt == 0) {
s = (*s < '5') ? "0" : "1";
reqd = 1;
} else {
reqd = strlen(s);
if (reqd > decpt) reqd++;
if (decpt == 0) reqd++;
}
if (sign) reqd++;
p = sout;
e = p + reqd;
pad = width - reqd;
if (pad > 0) {
e += pad;
while (pad-- > 0) *p++ = ' ';
}
if (sign) *p++ = '-';
if (decpt <= 0 && prec > 0) {
*p++ = '0';
*p++ = '.';
e++;
while ( decpt < 0 ) {
decpt++;
*p++ = '0';
}
}
while (p < e) {
*p++ = *s++;
if (p == e) break;
if (--decpt == 0) *p++ = '.';
}
if (width < 0) {
pad = (reqd + width) * -1;
while (pad-- > 0) *p++ = ' ';
}
*p = 0;
return sout;
}
#endif