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.

任洋\ZL.EXE
....\任洋作品简介.txt
任洋

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