C++中删除string对象中的某个字符

string eraseCharacter(string &str)
{
vector<string::iterator> vect;
for(string::iterator iter = str.begin(); iter != str.end(); ++iter)
{
if(ispunct(*iter))
{
vect.push_back(iter);
}
}
for(vector<string::iterator>::iterator iter = vect.end() - 1; iter != vect.begin() - 1; --iter)
{
str.erase(*iter);
}
return str;
}

string eraseCharacter(string &str)
{
string::size_type index = 0;
while(index != str.size())
{
if(ispunct(str[index]))
{
str.erase(index, 1);
--index;
}
++index;
}
return str;
}

方法三：

string eraseCharacter(string &str)
{
for(string::size_type i = 0; i != str.size(); ++i)
{
if(ispunct(str[i]))
{
str.erase(i, 1);
--i;
}
}
return str;
}