Based on the 4 x 4 matrix keyboard, 51 microcontroller simple calculator functions on the LED display

3 计算器4x4矩阵键盘\KEY-4X4.DSN
3 计算器4x4矩阵键盘\KEY-4X4.PWI
3 计算器4x4矩阵键盘\Last Loaded KEY-4X4.DBK
3 计算器4x4矩阵键盘\main.c
3 计算器4x4矩阵键盘\main.LST
3 计算器4x4矩阵键盘\main.OBJ
3 计算器4x4矩阵键盘\pro
3 计算器4x4矩阵键盘\pro.hex
3 计算器4x4矩阵键盘\pro.lnp
3 计算器4x4矩阵键盘\pro.M51
3 计算器4x4矩阵键盘\pro.plg
3 计算器4x4矩阵键盘\pro.uvgui.Administrator
3 计算器4x4矩阵键盘\pro.uvopt
3 计算器4x4矩阵键盘\pro.uvproj
3 计算器4x4矩阵键盘\pro_uvopt.bak
3 计算器4x4矩阵键盘\pro_uvproj.bak
3 计算器4x4矩阵键盘\矩阵键盘.doc
3 计算器4x4矩阵键盘

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