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  #include "stdio.h" 
  #include "agjdn.c" 
  main() 
  { int i; 
    static double a[4][4]={ {1.0,3.0,2.0,13.0}, 
                            {7.0,2.0,1.0,-2.0}, 
                            {9.0,15.0,3.0,-2.0}, 
                            {-2.0,-2.0,11.0,5.0}}; 
    static double b[4][2]={ {9.0,0.0},{6.0,4.0}, 
                            {11.0,7.0},{-2.0,-1.0}}; 
    if (agjdn(a,b,4,2)!=0) 
      for (i=0;i<=3;i++) 
        printf("x(%d)=%13.7e,  %13.7e\n",i,b[i][0],b[i][1]); 
  }