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-rw-r--r--ch1/1-15_temp-convert-func.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/ch1/1-15_temp-convert-func.c b/ch1/1-15_temp-convert-func.c
index aa59cf6..ae30d4f 100644
--- a/ch1/1-15_temp-convert-func.c
+++ b/ch1/1-15_temp-convert-func.c
@@ -1,5 +1,19 @@
#include <stdio.h>
+/* The C Programming Language: 2nd Edition
+ *
+ * Exercise 1-15: Rewrite the temperature conversion program of Section 1.2 to
+ * use a function for conversion.
+ *
+ * Answer: This exercise teaches you the purpose of functions: to perform
+ * specific operations that can be reused. Writing good functions is the
+ * foundation of good programming. Without functions, programming would still
+ * be in its version of the stone age.
+ *
+ * In the case of temperature conversion, all you really need to do is
+ * outsource the math to a function and return the result.
+ */
+
#define MAX_F 300.0
#define STEP 20.0