只适用于整数的,要是有小数就要修改一下
int i
string str_1,str_num=''
dec li
//循环
for i=1 to len(str_1)
if isnumber(mid(str_1,i,1)) =false and mid(str_1,i,1)<>'.' then continue
str_num+=mid(str_1,i,1)
next
//li就是得到的数字
li=dec(str_num)
int i
string str_1,str_num=''
long li
//循环
for i=1 to len(str_1)
if isnumber(mid(str_1,i,1)) =false then continue
str_num+=mid(str_1,i,1)
next
//li就是得到的数字
li=long(str_num)