what are these characters?

[abdul]

I did not understand the following line:

cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;

which value does cxCaps get? And what are the "?" and ":" symbols used for?

[Vlatko]

The ? and : are the C++ only ternary operator. It means that if the expression tm.tmPitchandFamily & 1 is true then 3 is multiplied by cxChar else 2.

[abdul]

but 1 is not a boolean expression. How can it be true of false?

[parksie]

x & 1 checks bit patterns, and if it's found, returns true. Plus most integers can be converted to bool (0 = false, everything else = true).

[Vlatko]

0 is false in C++ and everyother value is true. That is why
while(1) is an infinite loop. But in this case it is not just 1 it is
tm.tmPitchAndFamily & 1

[Vlatko]

Whoops!! parksie is faster

[Zaei]

Hope im not sounding stupid hear, but...

Doesnt "x & 1" perform a binary AND on x with 0x0001?

Z.

[HarryW]

Yes, like Parksie said about the bit patterns, & is a bitwise operator.

& - bitwise AND
&& - boolean AND