:Ƴַ

ʽ:
SymRemove(f , t , p)
SymRemove(f , t)
SymRemove(f )

f:ƳԪַ
t:ʾƳ,Ϊ0ʾƳַβ˵pַ,Ϊ1ʾƳַ׶˵pַ,Ϊ2ʾƳַβ˵pַ,Ϊ3ʾƳַpַĬΪ0.
p:Ƴַž,˲ĬΪո

:

f = "456.789";
p = ".";
s=SymRemove(f,3,p)//سõ½
s = "456789"