/in/foo.cc: In function 'void PX(int (*)[500], int, int, int, int)':
/in/foo.cc:27:10: error: 'k' was not declared in this scope
     a[i][k+1]=x;
          ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:41:7: error: expected primary-expression before ',' token
  PX(a[,m,n,i,j);
       ^
/in/foo.cc:41:15: error: expected ']' before ')' token
  PX(a[,m,n,i,j);
               ^