Module 7: Read the Grid from a File

a.c

@@ -2,42 +2,58 @@
 #include <string>   // support for strings
 #include <vector>   // support for vectors
 #include <assert.h>
+#include <fstream> // support for reading files
 using namespace std;
 
 // For compiling C++ code
 // g++ a.c -o a
 struct Grid
 {
-  Grid(string n) {
+  Grid(string n)
+  {
     name = n;
   }
   int rows() const { return lines.size(); }
-  int cols() const { 
-    if (lines.empty()) {
+  int cols() const
+  {
+    if (lines.empty())
+    {
       return 0;
-    } else {
-      return lines[0].size(); }
     }
-  void Load() {
-    lines.push_back("DOG....");
-    lines.push_back("---....");
-    lines.push_back("----...");
-    lines.push_back("-------");
-    lines.push_back("...----");
-    lines.push_back("....---");
-    lines.push_back("....CAT");
+    else
+    {
+      return lines[0].size();
+    }
   }
-  void Check() const {
+  void LoadFromFile(string filename)
+  {
+    ifstream f;
+    f.open("test");
+    while (!f.eof())
+    {
+      string line;
+      getline(f, line);
+      // cout << line << "\n";
+      if (!line.empty() && line[0] != '#')
+      {
+        lines.push_back(line);
+      }
+    }
+  }
+  void Check() const
+  {
     for (string s : lines)
     {
       assert(s.size() == cols());
     }
   }
-  void Print() const {
+  void Print() const
+  {
     cout << "Grid: " << name
-        << " (rows=" << rows()
-        << ", cols=" << cols() << ")\n";
-    for (string s : lines) {
+         << " (rows=" << rows()
+         << ", cols=" << cols() << ")\n";
+    for (string s : lines)
+    {
       cout << "  " << s << "\n";
     }
   }
@@ -49,7 +65,7 @@ int main()
 {
   Grid grid("MY GRID");
 
-  grid.Load();
+  grid.LoadFromFile("test");
   grid.Check();
   grid.Print();
 }

a.py

@@ -13,14 +13,12 @@ class Grid:
         else:
             return len(self.lines[0])
 
-    def Load(self):
-        self.lines.append("DOG....")
-        self.lines.append("---....")
-        self.lines.append("----...")
-        self.lines.append("-------")
-        self.lines.append("...----")
-        self.lines.append("....---")
-        self.lines.append("....CAT")
+    def LoadFromFile(self, filename):
+        with open(filename, 'r') as f:
+            for line in f:
+                #print(f"{line.rstrip()} ({len(line.rstrip())})")        
+                if not line.startswith('#'):
+                    self.lines.append(list(line.rstrip()))
 
     def Check(self):
         for s in self.lines:
@@ -36,6 +34,6 @@ class Grid:
 if __name__ == "__main__":
     grid = Grid("MY GRID")
 
-    grid.Load()
+    grid.LoadFromFile("test")
     grid.Check()
     grid.Print()