Answer Posted / newpolaris

bool IsInStr(char ch, const std::string& B)
{
return std::string::npos != B.find(ch);
}

// act fuction
std::string remove_same_char(const std::string& A, const
std::string& B)
{
typedef std::string::const_iterator cstr_const_it;
cstr_const_it iCSTR = A.begin();

// FOR OPTIMIZATION NRVO IS NEEDED
// ? IS POSSIBLE?
std::string _rt;

while ( iCSTR != A.end() )
{
if (!IsInStr(*iCSTR,B)) _rt+=*iCSTR;

iCSTR++;
}

return _rt;
}

int main()
{
std::string x = "hello";
const std::string y = "open";
x = remove_same_char(x, y);
}

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