1 files changed, 37 insertions, 0 deletions
diff --git a/ch1/ftoc.c b/ch1/ftoc.c
new file mode 100644
index 0000000..70b994a
--- /dev/null
+++ b/ch1/ftoc.c
@@ -0,0 +1,37 @@
+#include<stdio.h>
+
+#define     LOWER   0       // lower limit of table 
+#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.
+ */
+main() {
+    float fahr, celcius;
+    int lower, upper, step;
+
+    lower = LOWER;      // lower limit of temperature table
+    upper = UPPER;    // upper limit of temperature table
+    step = STEP;      // step size
+
+    fahr = lower;
+
+    printf("%3s %6s\n", "F", "C");
+
+    //    while (fahr <= upper) {
+    //        celcius = 5.0 / 9.0 * (fahr - 32.0);
+    //        printf("%3.0f %6.1f\n", fahr, celcius);
+    //        fahr = fahr + step;
+    //    }
+
+    for (fahr = UPPER; fahr >= LOWER; fahr = fahr - STEP) {
+        printf("%3.0f %6.1f\n", fahr, ftoc(fahr));
+    }
+}
+
+float ftoc(int fahr) {
+    return (5.0 / 9.0) * (fahr - 32);
+}