A1=0
           B1=0
           Num1=0
           for u=1 to 4
               sele zifubiao1
               go u
               X=cnt_zifu11
               A1=A1+cnt_zifu11
               C=zifu11
               for v=1 to 4
                   sele zifubiao2
                   go v
                   Y=cnt_zifu12
                   B1=B1+cnt_zifu12
                   D=zifu12
                   SET EXACT OFF
                   if C=D=.T.
                      Num1=Num1+min(X,Y)
                   endif  
               endfor   
           endfor
           xiangsidu1=2*Num1/(A1+B1)
           ?xiangsidu1

循环次数好像老是不对，感觉是X和Y赋值的语句的问题

[此贴子已经被作者于2016-6-7 20:51编辑过]

楼主没有电脑吗

循环次数怎么了？

第一次看到“C=D=.T.”的用法，学习了！

上述代码中X、Y的赋值不会对循环变量u、v产生影响的，可能影响程序执行的可能就是记录数少于循环数。

A1=0
B1=0
Num1=0
for u=1 to 4
    sele zifubiao1 &&选择表1
    go u &&去第1～4条记录
    X=cnt_zifu11 &&给X赋值，估计是“数值”
    A1=A1+cnt_zifu11 &&累计，这里可以改为 A1=A1+X
    C=zifu11 &&给C赋值，估计是“数值”
    for v=1 to 4
        sele zifubiao2 &&选择表2
        go v &&去第1～4条记录
        Y=cnt_zifu12 &&给Y赋值，估计是“数值”
        B1=B1+cnt_zifu12 &&累计，这里可以改为 B1=B1+Y
        D=zifu12 &&给D赋值，估计是“数值”
        SET EXACT OFF
        if C=D=.T. &&判断C=D,这里改为 if c=d
           Num1=Num1+min(X,Y) &&累计X,Y的最小值
        endif
    endfor   
endfor
xiangsidu1=2*Num1/(A1+B1)
?xiangsidu1
**除了你指出的错误外，整理出如下；
SET EXACT OFF
A1=0
B1=0
Num1=0
for u=1 to 4
    sele zifubiao1 &&选择表1
    go u &&去第1～4条记录
    X=cnt_zifu11 &&给X赋值，估计是“数值”
    A1=A1+cnt_zifu11 &&累计，这里可以改为 A1=A1+X
    C=zifu11 &&给C赋值，估计是“数值”
    for v=1 to 4
        sele zifubiao2 &&选择表2
        go v &&去第1～4条记录
        Y=cnt_zifu12 &&给Y赋值，估计是“数值”
        B1=B1+cnt_zifu12 &&累计，这里可以改为 B1=B1+Y
        D=zifu12 &&给D赋值，估计是“数值”
        if C=D &&判断C=D
           Num1=Num1+min(X,Y) &&累计X,Y的最小值
        endif
    endfor   
endfor
xiangsidu1=2*Num1/(A1+B1)
?xiangsidu1
没有其他语法错误了，假设，楼主表1有4条记录，表2也有4条记录，楼主是想根据 字段 zifu11=zifu12，来最小值累计对应的 cnt_zifu11与cnt_zifu12

CREATE CURSOR zifubiao1(zifu11 C(6),cnt_zifu11 N(4))
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a1',47)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a2',35)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a3',53)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a4',24)

CREATE CURSOR zifubiao2(zifu12 C(6),cnt_zifu12 N(4))

INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a4',23)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a3',47)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a2',60)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a1',42)

SET EXACT OFF
A1=0
B1=0
Num1=0
for u=1 to 4
    sele zifubiao1 &&选择表1
    go u &&去第1～4条记录
    X=cnt_zifu11 &&给X赋值，估计是“数值”
    A1=A1+cnt_zifu11 &&累计，这里可以改为 A1=A1+X
    C=zifu11 &&给C赋值，估计是“数值”
    for v=1 to 4
        sele zifubiao2 &&选择表2
        go v &&去第1～4条记录
        Y=cnt_zifu12 &&给Y赋值，估计是“数值”
        B1=B1+cnt_zifu12 &&累计，这里可以改为 B1=B1+Y
        D=zifu12 &&给D赋值，估计是“数值”
        if C=D &&判断C=D
           Num1=Num1+min(X,Y) &&累计X,Y的最小值
        endif
    endfor   
endfor
xiangsidu1=2*Num1/(A1+B1)
?xiangsidu1

如果楼主是想求表1与表2，通过zifu11=zifu12，累计cnt_zifu11 为A1,累计cnt_zifu12 为B1，累计cnt_zifu11与cnt_zifu12 的最小值为 Num1的话
估计 B1=0要放在 for v=1 to 4 的前面，如
B1=0
for v=1 to 4

*下面用SQL连接来验证
CREATE CURSOR zifubiao1(zifu11 C(6),cnt_zifu11 N(4))
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a1',47)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a2',35)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a3',53)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a4',24)
INSERT INTO zifubiao1(zifu11,cnt_zifu11) values('a5',40) &&多出的记录

CREATE CURSOR zifubiao2(zifu12 C(6),cnt_zifu12 N(4))

INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a4',23)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a3',47)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a2',60)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a1',42)
INSERT INTO zifubiao2(zifu12,cnt_zifu12) values('a6',82) &&多出的记录

SET EXACT OFF
A1=0
B1=0
Num1=0
for u=1 to 4
    sele zifubiao1
    go u
    X=cnt_zifu11
    A1=A1+cnt_zifu11
    C=zifu11
    b1=0
    for v=1 to 4
        sele zifubiao2
        go v
        Y=cnt_zifu12
        B1=B1+cnt_zifu12
        D=zifu12
        if C=D
           Num1=Num1+min(X,Y)
        endif
    endfor   
ENDFOR
xiangsidu1=2*Num1/(A1+B1)
?"方法1：",TRANSFORM(a1),TRANSFORM(b1),TRANSFORM(xiangsidu1)

*连接表，找出最小值
SELECT a.*,b.*,IIF(,,) as min_cnt FROM zifubiao1 a;
 left join zifubiao2 b ON a.zifu11=b.zifu12 INTO CURSOR biao3

SELECT SUM(cnt_zifu11) as A1,SUM(cnt_zifu12) as B1,SUM(min_cnt) as Num1 FROM biao3 WHERE !ISNULL(zifu12) INTO CURSOR biao4

SELECT biao4
xiangsidu1=2*Num1/(A1+B1)
?"方法2：",TRANSFORM(a1),TRANSFORM(b1),TRANSFORM(xiangsidu1)