交换

  void swap(void *vp1,51Testing软件测试网K#P!O)Y4J {
            void *vp2,51Testing软件测试网VZ"~A%u5V
              int size)51Testing软件测试网|!m.nSs1m5\.wM
     {51Testing软件测试网-e{7j"cL^V3a
       char buffer[size]; 51Testing软件测试网$b(_'VS)I
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       memcpy(buffer,vp1,size); 51Testing软件测试网'OmEgu]4Ge4j
       memcpy(vp1,vp2,size);51Testing软件测试网tg"tC%b\
       memcpy(vp2,buffer,size);
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