???????????????????
???????????? ???????[ 2012/9/21 10:20:47 ] ????????
????#define S(a??b) a*b
????area=S(3??2)
????int S(int a??int b)
????{ int s;
????s=a*b;
????return(s);
????}
??????????????????
??????????????Ч?????????define???????????????????????????????????к?????????????????????????????????????S(a??b)?????滻??a*b????????????????????????:
????1.??????????aera=S(x+y??x-y)?????滻??x+y*x-y
????2.?????????
?????????
????#define S(a) (a)*(a)
???????S(a++)?????(a++)*(a++)??????????????????????????в???????
????????????????????????滻???????????????????????????
??????????????????????????????;
??????????????壬????????????????????;
?????????????????滻??????????????S(a??b)????a*b???棬a??b??????岢????????????????????S??????ж???????????a??b??
??????????????????????????????????????С?
?????????????й????л?????в??????????ù???????????????????С?
??????
???·???
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