Add exercise 1-5

chapter_1/exercise_1_5/BUILD

@@ -0,0 +1,16 @@
+cc_library(
+    name = "lib",
+    srcs = ["lib.c"],
+    hdrs = ["lib.h"],
+)
+
+cc_test(
+    name = "test",
+    size = "small",
+    srcs = ["test/test.cc"],
+    deps = [
+        ":lib",
+        "@googletest//:gtest",
+        "@googletest//:gtest_main",
+    ],
+)

chapter_1/exercise_1_5/lib.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+/* print Fahrenheit-Celsius table */
+int exercise_1_5()
+{
+	int fahr;
+
+	for (fahr = 300; fahr >= 0; fahr = fahr - 20)
+		printf("%3d %6.1f\n", fahr, (5.0 / 9.0) * (fahr - 32));
+
+	return 0;
+}

chapter_1/exercise_1_5/lib.h

@@ -0,0 +1 @@
+int exercise_1_5();

chapter_1/exercise_1_5/test/test.cc

@@ -0,0 +1,36 @@
+#include <gtest/gtest.h>
+
+#include <sstream>
+#include <string>
+
+extern "C" {
+#include "../lib.h"
+}
+
+TEST(Exercise_1_5, ReverseOrder) {
+  std::string line;
+
+  testing::internal::CaptureStdout();
+
+  exercise_1_5();
+
+  std::string output = testing::internal::GetCapturedStdout();
+
+  EXPECT_EQ(output,
+            "300  148.9\n"
+            "280  137.8\n"
+            "260  126.7\n"
+            "240  115.6\n"
+            "220  104.4\n"
+            "200   93.3\n"
+            "180   82.2\n"
+            "160   71.1\n"
+            "140   60.0\n"
+            "120   48.9\n"
+            "100   37.8\n"
+            " 80   26.7\n"
+            " 60   15.6\n"
+            " 40    4.4\n"
+            " 20   -6.7\n"
+            "  0  -17.8\n");
+}