Add LCD code

lcd/CMakeLists.txt

@@ -1,5 +1,7 @@
 conan_cmake_run(CONANFILE conanfile.py BASIC_SETUP CMAKE_TARGETS BUILD missing)
 
+include_directories(lib)
+
 add_subdirectory(lib)
 add_subdirectory(src)
 add_subdirectory(test)

lcd/README.md

@@ -1,2 +1,6 @@
 [< Back](../README.md)
 # Mod(C++) - Lcd Exercise
+
+* Add tests in [lcd_tests.cpp](test/lcd_tests.cpp) and implementation in 
+[lcd.cpp](lib/lcd.cpp) to support printing all two digit numbers
+* Set the MAX variable in [main.cpp](src/main.cpp) to 99 and print all the numbers

lcd/lib/lcd.cpp

@@ -1,5 +1,40 @@
-//
-// Created by patricia on 11/29/2020.
-//
-
 #include "lcd.hpp"
+
+lcd_grid lcd(std::string s1,
+             std::string s2,
+             std::string s3) {
+  lcd_grid result;
+  result.push_back(s1);
+  result.push_back(s2);
+  result.push_back(s3);
+  return result;
+}
+
+const lcd_grid digits[] =
+    {
+        lcd(" _ ",
+            "| |",
+            "|_|"
+        ),
+        lcd("   ",
+            "  |",
+            "  |"
+        ),
+        lcd(" _ ",
+            " _|",
+            "|_ "
+        ),
+    };
+
+lcd_grid lcd(int value) {
+  if (value < 10)
+    return digits[value];
+  else {
+    lcd_grid lhs = lcd(value / 10);
+    lcd_grid rhs = digits[value % 10];
+    return lcd(
+        lhs[0] + ' ' + rhs[0],
+        lhs[1] + ' ' + rhs[1],
+        lhs[2] + ' ' + rhs[2]);
+  }
+}

lcd/lib/lcd.hpp

@@ -1,8 +1,12 @@
-#ifndef LCD_LCD_HPP
+#pragma once
-#define LCD_LCD_HPP
 
-class lcd {
+#include <string>
+#include <vector>
 
-};
+typedef std::vector<std::string> lcd_grid;
 
-#endif //LCD_LCD_HPP
+lcd_grid lcd(int value);
+
+lcd_grid lcd(std::string s1,
+             std::string s2,
+             std::string s3);

lcd/src/main.cpp

@@ -1,3 +1,12 @@
-int main(int argc, char * argv[]) {
+#include <iostream>
-  return 0;
+#include "lcd.hpp"
+
+static const int MAX = 3;
+
+int main() {
+  for (int i = 0; i < MAX; i++) {
+    auto grid = lcd(i);
+    for (const auto & line: grid)
+      std::cout << line << "\n";
+  }
 }

lcd/test/CMakeLists.txt

@@ -3,7 +3,7 @@ find_package(GTest REQUIRED)
 
 include(GoogleTest)
 
-add_executable(lcd_tests tests.cpp)
+add_executable(lcd_tests lcd_tests.cpp)
 target_link_libraries(lcd_tests GTest::GTest liblcd)
 
 gtest_discover_tests(lcd_tests TEST_PREFIX lcd:)

lcd/test/lcd_tests.cpp

@@ -0,0 +1,46 @@
+#include <gtest/gtest.h>
+
+#include "lcd.hpp"
+#include <iostream>
+
+std::string to_string(lcd_grid grid) {
+  std::stringstream output;
+  for (const auto & str: grid)
+    output << str;
+  return output.str();
+}
+
+void lcd_spec(int value, lcd_grid grid) {
+  std::string expected = to_string(grid),
+      actual = to_string(lcd(value));
+  if (expected != actual) {
+    std::cerr
+        << "lcd(" << value << ")\n"
+        << "expected==\n"
+        << expected << '\n'
+        << "actual==\n"
+        << actual << std::endl;
+    std::exit(EXIT_FAILURE);
+  }
+}
+
+TEST(LcdTest, Zero) {
+  lcd_spec(0, lcd(
+      " _ ",
+      "| |",
+      "|_|"
+  ));
+}
+
+TEST(LcdTest, Twelve) {
+  lcd_spec(12, lcd(
+      "     _ ",
+      "  |  _|",
+      "  | |_ "
+  ));
+}
+
+int main(int argc, char * argv[]) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}

lcd/test/tests.cpp

@@ -1,10 +0,0 @@
-#include <gtest/gtest.h>
-
-TEST(LcdTest, Initial) {
-  EXPECT_EQ(1, 2);
-}
-
-int main(int argc, char* argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}