51单片机简易计算器
fi
cludereg51hi
cludemathhdefi
eucharu
sig
edchardefi
eui
tu
sig
edi
tsbitbeepP23sbitdulaP26sbitwelaP27sbitrwP11sbitrsP10sbitlcde
P25voidyu
sua
voidkeyi
putcharsvoidwrite_datacharddata
fvoidwrite_comcharcomma
dvoiddisplaylo
gavoidi
itvoiddealerrorvoiddataoverflow
voidwelcomecharcodetable10xee0xde0xbe0x7e0xed0xdd0xbd0x7d0xeb0xdb0xbb0x7b0xe70xd70xb70x77charcodetable2