float to char* question

Created Fri, 03 Jan 2014 21:11:42 +0000 by kaaasap

kaaasap

Fri, 03 Jan 2014 21:11:42 +0000

stdlib.h line 162:

char * _EXFUN(gcvtf,(float,int,char *));

is this what I would for float to char*? The reason I ask is 4Dsystems VisiGenie requires:

genieWriteStr(index, char*)

to "print" to a string. I need to print a decimal point and tenths (0000.x).

majenko

Fri, 03 Jan 2014 21:29:38 +0000

Yep, or you can use sprintf.

void setup() {
	Serial.begin(9600);
	char temp[8];
	gcvtf(0.348173, 4, temp);
	Serial.println(temp);
	sprintf(temp, "%.4f", 0.348173);
	Serial.println(temp);
}

void loop() {
}

-->

0.3482
0.3482

kaaasap

Fri, 03 Jan 2014 21:37:59 +0000

Just after posting I tested it too.

4D's VisiGenie doesn't support sprintf unfortunately.

Hopefully, if someone searches the forums they will find this.