[C/C++] C Macro token concatenation
取自wikihttp://en.wikipedia.org/wiki/C_preprocessorCode Example:#define MYCASE(item,id) case id: item##_##id = id; break; Example Result: switch(x) { MYCASE(wi …
difference
取自wikihttp://en.wikipedia.org/wiki/C_preprocessorCode Example:#define MYCASE(item,id) case id: item##_##id = id; break; Example Result: switch(x) { MYCASE(wi …