how to remove all spaces from a string in cpp code example

Example 1: c++ remove space from string

static std::string removeSpaces(std::string str)
{
	str.erase(remove(str.begin(), str.end(), ' '), str.end());
	return str;
}

Example 2: remove space in string c++

string removeSpaces(string str)
{
    stringstream s(str);
    string temp;
    str = "";
    while (getline(s, temp, ' ')) {
        str = str + temp;
    }
    return str;
}
//Input: Ha Noi Viet Nam
//Output: HaNoiVietNam