prepending a number to examples to keep them in order

chapter-01/1-temperature-io/Makefile

@@ -0,0 +1,2 @@
+all:
+	gcc -o temperature-table.x86_64 main.c

chapter-01/1-temperature-io/main.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+#define     LOWER   0       /* lower limit of table */
+#define     UPPER   300     /* upper limit of table */
+#define     STEP    20      /* increment size */
+
+int main()
+{
+    float fahr, celsius, tModifier;
+
+    fahr = LOWER;
+    tModifier = (5.0/9.0);
+    while (fahr <= UPPER) {
+        celsius = tModifier * (fahr - 32.0);
+        printf("%3.0f°F\t%5.1f°C\n", fahr, celsius);
+        fahr = fahr + STEP;
+    }
+}