add solution of HW4

hws/yelp_businesses/Business.h

@@ -0,0 +1,31 @@
+#ifndef BUSINESS_H
+#define BUSINESS_H
+
+#include <string>
+
+class Business {
+public:
+    //constructs a Business by parsing a JSON-formatted line
+    Business(const std::string &jsonLine);
+    //Accessors
+    std::string getName() const;
+    std::string getCategories() const;
+    double      getRating() const;
+    int         getPrice() const;
+    int         getReviewCount() const;
+    std::string getCity() const;
+    std::string getPostalCode() const;
+    //returns a string representation of the star rating
+    std::string getStarString() const;
+    
+private:
+    std::string name;
+    std::string categories;
+    double      rating;
+    int         price;
+    int         review_count;
+    std::string city;
+    std::string postal_code;
+};
+
+#endif // BUSINESS_H