1:在DOS下打入zl,程序内存驻留

2：按F1进入程序

3： 1 2 3 4 5 6 7 8 9 0 - =

分别代表 1 2 3 4 5 6 7 8 9 0 - +

在矩行框中可做加减法

键入表达示后按回车可得答案

3：按F2退出界面

4：打zl/q将程序退出内存。 　　-1: In DOS, enter the zl, program memory resides 2: Press F1 to enter program 3: 1 2 3 4 5 6 7 8 9 0- = each representation 1 2 3 4 5 6 7 8 9 0-+ OK box at the moment Type the expression in the show to do addition and subtraction method available and press Enter Answer 3: Press F2 exit interface 4: Playing zl/q quit the program memory.