The calculator is based on STC89C52RC Smallest single-chip system for the control of the core, Also increased 1602 LCD screen, Matrix keyboard, buzzer, 8 Position led Lights and other peripheral hardware circuits. Math can be achieved, decimals, negative four operations There backspace, reset function has accrued functions has a decimal to binary, decimal to hexadecimal function. In order to increase Calculator practicality, Will expand to its maximum operational range of plus or minus one million, When the operation result is out of range, LCD display OVERFLOW! Buzzer sounding reminder, 8 A led Achieve water lights. Binary and hexadecimal conversion range 0 to 255 For SCM 8 A IO Band into the mouth. Among them, the decimal to binary, the 8 A led Corresponding means Shows, lights representatives 1 , Destroy representatives 0 . Similarly, as the out of range alert appears. Fu

calc\STARTUP.A51
....\calc.plg
....\calc.DSN
....\calc.c
....\STARTUP.OBJ
....\key.h
....\calc.PWI
....\leddisplay.h
....\calc.bak
....\leddisplay.bak
....\key.bak
....\STARTUP.LST
....\calc.Opt
....\calc.LST
....\calc.OBJ
....\calc.lnp
....\calc.M51
....\calc.hex
....\calc
....\calcfortest.hex
....\calc_Opt.Bak
....\复件 calc.c
....\Last Loaded calc.DBK
....\复件 (2) calc.c
....\computing.h
....\calc_Uv2.Bak
....\calc.Uv2
....\computing.c
calc

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