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(1)    ÅДàij”µ(sh¨´)žéËØ”µ(sh¨´)

     ËØ”µ(sh¨´)ÊÇÖ¸Ö»Äܱ»×Ô¼ººÍ1Õû³ýµÄ”µ(sh¨´)

       int prime(int n)

          {

               int m;

               for(m=2;m<=sqrt(n);m++)

                   if(n%m==0)  return 0;

               return 1;

           }