string operator men får fejl

er nyvebynder somc programmør ar lige e 2 fejl..

include <string>

using namespace std;
string sPtr;

void main()
{
    string *sPtr = new string("Syl");
    *sPtr + = " Sta "; // its an array of character and its the content of the pointer with marked *
    cout<<*sPtr<<endl;

    // c++ dont use garage collection therefore whenever we use new operator we have to add delete

    delete sPtr;//dont forget
}

fejl....

error C2059: syntax error : '='
error C2065: 'cout' : undeclared identifier