first version of exercise 15

ex15.c

@@ -0,0 +1,47 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[])
+{
+    int ages[] = {23, 43, 12, 89, 2};
+    char *names[] = {
+        "Alan", "Frank",
+        "Mary", "John", "Lisa"
+    };
+
+    int count = sizeof(ages) / sizeof(int);
+    int i = 0;
+
+    for(i = 0; i < count; i++) {
+        printf("%s has %d years alive.\n",
+                names[i], ages[i]);
+    }
+
+    printf("---\n");
+
+    int *cur_age = ages;
+    char **cur_name = names;
+
+    for(i = 0; i < count; i++) {
+        printf("%s is %d years old.\n",
+                *(cur_name+i), *(cur_age+i));
+    }
+
+    printf("---\n");
+
+    for(i = 0; i < count; i++) {
+        printf("%s is %d years old again.\n",
+                cur_name[i], cur_age[i]);
+    }
+
+    printf("---\n");
+
+    for(cur_name = names, cur_age = ages;
+            (cur_age - ages) < count;
+            cur_name++, cur_age++)
+    {
+        printf("%s lived %d years so far.\n",
+                *cur_name, *cur_age);
+    }
+
+    return 0;
+}