string, sstream, stringstream: Write, Compile, Execute, andanalyze this given C++ program

#include
#include
#include
using namespace std;

int main() {
string s1="3.5 2.1";

cout << "num1:"<
float fnum1, fnum2;

(stringstream)s1>> fnum1>>fnum2;
cout<<"fnum1: "<return 0;
}