add chapter 4 Question 4

ch04/04.cpp

@@ -0,0 +1,14 @@
+# include <iostream>
+# include <string>
+using namespace std;
+
+int main(){
+	string f_nm, l_nm, nm;
+	cout << "Enter your first name: ";
+	getline(cin, f_nm);
+	cout << "Enter your last name: ";
+	getline(cin, l_nm);
+	nm = f_nm + ", " + l_nm;
+	cout << "Here is the information in a single string: " << nm << endl;
+	return 0;
+}