SET TALK OFF
DIME A(4)
B="9"
A=""
FOR I=1 TO 4
FOR J=1 TO I
A(I)=A(I)+B
ENDFOR
ENDFOR
FOR I =1 TO 4
? STR(LEN(A(I)),1)+SPACE(5-I)+A(I)
ENDFOR
RETU
答案是
1 9
2 99
3 999
4 9999
我不明白的是为什么A(1)=9 A(2)=99
有木有人帮我看看