Seems ch3 3.61 is not correct, fyi is a possible correct one

[dufufeisdu]

/**
P 3-61
long cread(long *xp) {
return (xp ? *xp : 0);
}
Explain:
The key point is to avoid * and xp come together.
*/
long cread_alt(long xp) {
long a=0;
return *(xp? xp:a);
}