begin --main函数
   for a in 1..9 loop
       for b in 1..9 loop
            for c in 1..9 loop
                 if 11*a+11*b+11*c = 100*a+10*b+c then 
                    dbms_output.put_line(a||‘ ‘||b||‘ ‘||c); 
                 end if; 
            end loop; 
        end loop;
    end loop;
end;

输出

1  9  8

三个 个位数a,b,c 满足 aa+bb+cc = abc 求a,b,c 11+99+88=198