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Possible Duplicate:
What does ## mean for the C(C++) preprocessor?
#define SIMPLE16_DESC_FUNC1(num1, log1) \
bool \
Simple16::try##num1##_##log1##bit(uint32_t *n, uint32_t len) \
{ \
uint32_t i; \
uint32_t min; \
\
min = (len < num1)? len : num1; \
\
for (i = 0; i < min; i++) { \
if (int_utils::get_msb(n[i]) > log1 - 1) \
return false; \
} \
\
return true; \
}
我在某人的代码中找到了这段代码，似乎“##”运算符在函数名中起着重要作用。谁能告诉我它的用法？