keil the development of addition and subtraction by 51 single-chip calculator that is very difficult to do multiplication, a multiplication own calculator can also be felt at least I did not feel how slow

calculator
..........\calculator
..........\calculator.c
..........\calculator.hex
..........\calculator.lnp
..........\calculator.LST
..........\calculator.M51
..........\calculator.Opt
..........\calculator.plg
..........\calculator.Uv2
..........\calculator_1.c
..........\calculator_1.LST
..........\calculator_1.OBJ
..........\calculator_Opt.Bak
..........\calculator_Uv2.Bak
..........\STARTUP.A51
..........\STARTUP.LST
..........\STARTUP.OBJ

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