#define MAX(a, b) ((a) > (b) ? (a) : (b))
[ ... ]
int x = MAX(foo, bar++); // incremented either once or twice
Oops.
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1 comment:
Macros are far less innocuous than that example pictures them. I remember someone doing something like:
#define MIN(a, b) ((a) < (b) ? (a) : (b))
int foo(int x) {
return x > 0 ? MIN(x, foo(x/2)) : 0;
}
So evaluating this function took him linear rather than logarithmic time (as it would have happened had he not used a macro).
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