RobotC 3.50 bug 2

MHTS · Sat Sep 15, 2012 3:17 pm

I found bug #2.


	Code: task main() { short x = 55; nxtDisplayTextLine(0, "x0=%d", x); nxtDisplayTextLine(1, "x1=%d", ((long)x + 128)200); nxtDisplayTextLine(2, "x2=%d", ((long)x + 128)200/255); nxtDisplayTextLine(3, "x3=%d", (((long)x + 128)*200)/255); }

It gave the following output:


	Quote: x0=55 x1=36600 x2=0 x3=143

Admittedly, I may be at fault here. I believe ANSI-C evaluates operators with the same precedence from left to right. So it is supposed to multiply before divide. But I always tell the students to be safe and add parenthesis to make sure. And I broke my own advice. Regardless, I do think it is an ANSI-C compliance bug, although I can work around it with the extra pair of parenthesis.

RobotC 3.50 bug 2

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