#include <stdlib.h>
int i;
int vgks,gks;
int vseat1,vseat2,vseat3;
int waiting,all;
int lfs;
int gk_waited,lfs_waited;
int fusj(a)
int a;
{
 if(a>=0 && a<5)  return 10;
 else if (a>=5 && a<8)  return 20;
 else  return 25;
}
main()
{
 int seat1,seat2,seat3;
 lfs=3;
 seat1=seat2=seat3=0;
 srand((unsigned)time(NULL));
 printf("\nsk  sjs  gks  vs1  vs2 vs3  #1  #2  #3  gkd  dsj  lfs  sj\n");
 for(i=1;i<145;i++)
 {
  vgks=random(9);
  if(vgks>=0&&vgks<3)
   gks=0;
  else if (vgks>=3 && vgks<6)
   gks=1;
  else
   gks=2;
  all=waiting+gks;
  if (all>0 )
    { if (seat1==0)
      {vseat1=random(10);
       seat1=fusj(vseat1);
       all=all-1;
       lfs=lfs-1;
      }
     }


  if (all>0)
     {if (seat2==0)
       {vseat2=random(10);
    seat2=fusj(vseat2);
    all=all-1;
    lfs=lfs-1;
       }
     }

  if (all>0 )
     {if (seat3==0)
      {vseat3=random(10);
       seat3=fusj(vseat3);
       all=all-1;
       lfs=lfs-1;
      }
     }

  gk_waited=all*5;
  lfs_waited=lfs*5;
  waiting=all;
  printf("\n%d   %d    %d    %d    %d    %d   %d    %d  %d   %d    %d   %d   %d",i,vgks,gks,vseat1,vseat2,vseat3,seat1,seat2,seat3,waiting,gk_waited,lfs,lfs_waited);
  if (seat1 != 0)
       {seat1=seat1-5;
    if (seat1==0)
      lfs=lfs+1;
       }

  if (seat2 != 0)
      {seat2=seat2-5;
       if (seat2==0)
     lfs=lfs+1;
      }
  if (seat3 != 0)
      {seat3=seat3-5;
       if (seat3==0)
     lfs=lfs+1;
      }
  getch();
 }
 getch();
}




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不知上面的程序错在了哪里，只是报出error LNK2001: unresolved external symbol _random
Debug/11.exe : fatal error LNK1120: 1 unresolved externals
执行 link.exe 时出错.