Merge pull request fbsamples#12 from fbsamples/carljparker/use-std-string-20180727

Use std::string and cout instead of * char and printf

Author: carljparker

hello-buck-cxx/hello-buck.cxx

@@ -1,11 +1,11 @@
-#include "stdio.h"
+#include <iostream>
 #include "hello-string.h"
 
 int main () {
 
   hello_string * hello = new hello_string();
 
-  printf( "Hello, %s\n", hello -> get_string() );
+  std::cout << "Hello, " << hello -> get_string() << std::endl;
 
   return( 0 );
 

hello-buck-cxx/hello-string.cxx

@@ -4,11 +4,11 @@
 //
 // HELLOSTRING is defined in .buckconfig
 //
-const char * hello_string::HELLO = HELLOSTRING;
+const std::string hello_string::HELLO = HELLOSTRING;
 
 hello_string::hello_string() {};
 
-const char * hello_string::get_string() {
+const std::string hello_string::get_string() {
 
   return( HELLO );
 

hello-buck-cxx/hello-string.h

@@ -1,12 +1,14 @@
+#include <string>
+
 class hello_string {
 
   private:
-    static const char * HELLO;
+    static const std::string HELLO;
 
   public:
     hello_string(); 
 
-    const char * get_string();
+    const std::string get_string();
 
 };