remove space in string c++
#include <iostream>
#include <string>
using namespace std;
int main() {
string str = "Hello, world! This is a C++ string.";
for (int i = 0; i < str.length(); ++i) {
if (str[i] == ' ') {
str.erase(i, 1);
i--;
}
}
cout << str << endl;
return 0;
}