how to remove all whitespace from a string in c++ code example

Example 1: c++ remove whitespace from string

#include <algorithm>

int main()
{
    std::string str = "H e l l o";
    str.erase(remove(str.begin(), str.end(), ' '), str.end());
    std::cout << str; // Output Hello
    
    return 0;
}

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

Example 3: c++ remove trailing whitespace

remove trailing whitespace