remove space in string c 2b 2b

1#include <algorithm>
2
3int main()
4{
5    std::string str = "H e l l o";
6    str.erase(remove(str.begin(), str.end(), ' '), str.end());
7    std::cout << str; // Output Hello
8    
9    return 0;
10}

1static std::string removeSpaces(std::string str)
2{
3	str.erase(remove(str.begin(), str.end(), ' '), str.end());
4	return str;
5}

1string removeSpaces(string str)
2{
3    stringstream s(str);
4    string temp;
5    str = "";
6    while (getline(s, temp, ' ')) {
7        str = str + temp;
8    }
9    return str;
10}
11//Input: Ha Noi Viet Nam
12//Output: HaNoiVietNam