串基本操作的演示实现串的赋值,连接,求子串,计算长度等操作-Series basic operation of the demonstration achieve Series assignment, connectivity, in her series, calculating the length of such an operation
从键盘输入一个二进制数(位数小于等于80)显示其应得带符号和无符号十进制数-keyboard input from a binary number (less than the median 80), showing their entitlement with symbols and unsigned decimal number