Final preparations for project

src/sudoku.cpp

@@ -19,29 +19,72 @@ void Sudoku::FillBoard(std::string filePath) {
         sudokuFile >> line;
         std::cout << line << std::endl; 
     }
+    // TODO: Finish inputting sudoku file 
+    //       Really just needs to be split by digit then stored
 
 }
 
+// TODO: Implement solving algorithm
 void Sudoku::Solve(void) {
 
 }
 
+// TODO: Add checking for full board completion
 bool Sudoku::IsBoardSolved(void) {
     return true;
 }
 
+// TODO: Add printing of board for visuals
+//       Maybe also print during solve?
+void Sudoku::Print(void) {
+
+}
+
+// TODO: Add checking for row completion
 bool Sudoku::IsRowComplete(int row) {
     return true;
 }
 
+// TODO: Add checking for column completion
 bool Sudoku::IsColumnComplete(int column) {
     return true;
 }
 
+// WARNING: This function and one below could be swapped, untested
 std::vector<int> Sudoku::GetUnusedInRow(int row) {
-
+    std::vector<int> leftOver{0,1,2,3,4,5,6,7,8,9};
+    int number;
+    for (int i = 0; i < 9; i++) {
+        number = board[i][row];
+        if (leftOver[number] == number) {
+            leftOver[number] = 0;
+        }
+        if (leftOver[number] == 0) { // Two of same number was placed
+            leftOver[number] = -1;
+        }
+    }
+    for (auto it = leftOver.begin(); it != leftOver.end();) {
+        if (*it == 0) { it = leftOver.erase(it); }
+        else { ++it; }
+    }
+    return leftOver;
 }
 
 std::vector<int> Sudoku::GetUnusedInColumn(int column) {
-
+    std::vector<int> leftOver{0,1,2,3,4,5,6,7,8,9};
+    int number;
+    for (int i = 0; i < 9; i++) {
+        number = board[column][i];
+        if (leftOver[number] == number) {
+            leftOver[number] = 0;
+        }
+        if (leftOver[number] == 0) { // Two of same number was placed
+            leftOver[number] = -1;
+        }
+    }
+    for (auto it = leftOver.begin(); it != leftOver.end();) {
+        if (*it == 0) { it = leftOver.erase(it); }
+        else { ++it; }
+    }
+    return leftOver;
 }

src/sudoku.hpp

@@ -11,6 +11,7 @@ public:
     void FillBoard(std::string filePath);
     void Solve(void);
     bool IsBoardSolved(void);
+    void Print(void);
 private:
     bool IsRowComplete(int row);
     bool IsColumnComplete(int column);

src/sudoku_solver.cpp

@@ -1,5 +1,9 @@
 #include "sudoku.hpp"
 
+// TODO: 
+// Take in sudoku file from arguments
+// Run solve
+// Print solution
 int main(void) {
     return 0;
 }