7、都为从键盘输入1个整数,打印出它的算术平方根。[例4、2]:Programq421;Vara:integer;Begin Readln(a); If(a<0)then Begin Writeln(‘WRONG!’); Endelse Begin Writeln(a); Writeln(sqrt(a):8:2); End;End.Programq421;Vara:integer;BeginReadln(a);If(a<0)thenWriteln(‘WRONG!’)elseWriteln(sqrt(a):8:2);End.条件