Differences

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--- code:rprintf [2008/11/03 20:18] – created laurenceb
+++ code:rprintf [2008/11/06 01:59] (current) – laurenceb
@@ Line 1: / Line 1: @@
 ====== floating point print function ======
-This is based on the origional rprintf by Pascal Stang. however numDigits now refers to digits after decimal point, and the is no '+' character printed for +ive numbers.
+This is based on the origional rprintf by Pascal Stang. However numDigits now refers to digits after decimal point, and the is no '+' character printed for +ive numbers.
-<code c>
+<code c>void rprintfFloat(char numDigits, double x)
-void rprintfFloat(char numDigits, double x)
 {
 	unsigned char firstplace = FALSE;
-	unsigned char negative;
+	unsigned char i=25, digit;
-	unsigned char i=255, digit;
+	double place = 1000000000000000.0;
-	double place = 1.0;
+	if(x<0)
-	// save sign
-	negative = (x<0);
-	// convert to absolute value
-	x = (x>0)?(x):(-x);
-	// find starting digit place
-	for(i=0; i<15; i++)
 	{
-		if((x/place) < 10.0)
+		rprintfChar('-');
-			break;
+		x=-x;							//convert to absolute value
-		else
-			place *= 10.0;
 	}
-	// print polarity character
-	if(negative)
-		rprintfChar('-');
-	//else
-	//	rprintfChar('+');
-	// print digits
 	for(;i;i--)
 	{
-		digit = (x/place);
+		digit=x/place;
+		if(digit | firstplace)			//digit>=1
-		if(digit | firstplace | (place == 1.0))
 		{
-			firstplace = TRUE;
+			firstplace = TRUE;			//we have reached the first digit
 			rprintfChar(digit+0x30);
 		}
-		else
-			rprintfChar(' ');
 		if(place == 1.0)
 		{
-			rprintfChar('.');
+			if(!firstplace)
-			i=numDigits;
+				rprintfChar('0');	//always zero before the decimal point
+			rprintfChar('.');		//the decimal point
+			firstplace = TRUE;		//we have to print after the decimal place
+			i=numDigits+1;
 		}
+		x-=digit*place;
-		x -= (digit*place);
+		place/=10.0;
-		place /= 10.0;
 	}
-}
+}</code>
-</code>