minor changes

src/06/Solution/ch6_horseplay.cpp

@@ -19,7 +19,7 @@ std::vector<std::string> knight_moves(std::string knight){
     std::vector<std::string> moves;
     int x, y;
     x = knight[0] - 'a' + 1;
-    y = knight[1]-'0';
+    y = knight[1] - '0';
     const int delta1[2] = {-1, 1};
     const int delta2[2] = {-2, 2};
 
@@ -53,12 +53,20 @@ std::vector<std::string> knight_moves(std::string knight){
 // Main function
 int main(){
     std::string knight = "d5";
-
     std::vector<std::string> the_moves = knight_moves(knight);
     std::cout << std::endl << "Possible moves from " << knight << ": ";
 
     for (auto element : the_moves)
         std::cout << element << " ";
     std::cout << std::endl << std::endl << std::flush;
+
+    knight = "h7";
+    std::vector<std::string> the_moves = knight_moves(knight);
+    std::cout << std::endl << "Possible moves from " << knight << ": ";
+
+    for (auto element : the_moves)
+        std::cout << element << " ";
+    std::cout << std::endl << std::endl << std::flush;
+
     return 0;
 }