1 files changed, 9 insertions, 4 deletions
diff --git a/ftoc.c b/ftoc.c
index 2efa6f7..70b994a 100644
--- a/ftoc.c
+++ b/ftoc.c
@@ -4,6 +4,8 @@
 #define     UPPER   300     // upper limit of table 
 #define     STEP    20      // step size
 
+float ftoc(int fahr);
+
 /*
  * Print Fahrenheit-Celcius table for fahr = 0, 20, ... 300.
  */
@@ -11,9 +13,9 @@ main() {
     float fahr, celcius;
     int lower, upper, step;
 
-    lower = 0;      // lower limit of temperature table
-    upper = 300;    // upper limit of temperature table
-    step = 20;      // step size
+    lower = LOWER;      // lower limit of temperature table
+    upper = UPPER;    // upper limit of temperature table
+    step = STEP;      // step size
 
     fahr = lower;
 
@@ -26,7 +28,10 @@ main() {
     //    }
 
     for (fahr = UPPER; fahr >= LOWER; fahr = fahr - STEP) {
-        printf("%3.0f %6.1f\n", fahr, (5.0 / 9.0) * (fahr - 32));
+        printf("%3.0f %6.1f\n", fahr, ftoc(fahr));
     }
 }
 
+float ftoc(int fahr) {
+    return (5.0 / 9.0) * (fahr - 32);
+}