字符串函数举例 a="1234 b="4567 c=a+b d=val(a)+val(b) print c,d 123445675801 <<> 2021/222 102021/2/22 10 字符串函数举例 a="1234" b="4567" c=a+b d=val(a)+val(b) print c,d 12344567 5801