From 728a7c5bd8f6b2d1137cfa2c711d01d1d248dfe3 Mon Sep 17 00:00:00 2001
From: Dan Buch <daniel.buch@gmail.com>
Date: Mon, 19 Sep 2011 22:58:45 -0400
Subject: [PATCH] using separate func for printing different formats, but still
 need to write different funcs for different ways of looping?

---
 ex15.c | 55 ++++++++++++++++---------------------------------------
 1 file changed, 16 insertions(+), 39 deletions(-)

diff --git a/ex15.c b/ex15.c
index d3f8626..a7bf3c5 100644
--- a/ex15.c
+++ b/ex15.c
@@ -1,5 +1,16 @@
 #include <stdio.h>
 
+
+void print_names_ages(int count, char *names[], int ages[], const char *fmt)
+{
+    int i;
+    for(i = 0; i < count; i++) {
+        printf(fmt, names[i], ages[i]);
+    }
+    printf("---\n");
+}
+
+
 int main(int argc, char *argv[])
 {
     // create two arrays we care about
@@ -10,47 +21,13 @@ int main(int argc, char *argv[])
     };
     // safely get the size of ages
     int count = sizeof(ages) / sizeof(int);
-    int i = 0;
-
-    // first way using indexing
-    for(i = 0; i < count; i++) {
-        printf("%s has %d years alive.\n",
-                names[i], ages[i]);
-    }
-
-    printf("---\n");
-
-    // setup the pointers to the start of the arrays
-    int *cur_age = ages;
-    char **cur_name = names;
 
-    // second way using pointers
-    for(i = 0; i < count; i++) {
-        printf("%s is %d years old.\n",
-                *(cur_name+i), *(cur_age+i));
-    }
-
-    printf("---\n");
-
-    // third way, pointers are just arrays
-    for(i = 0; i < count; i++) {
-        printf("%s is %d years old again.\n",
-                cur_name[i], cur_age[i]);
-    }
-
-    printf("---\n");
-
-    // fourth way with pointers in a stupid complex way
-    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);
-    }
-
-    printf("---\n");
+    print_names_ages(count, names, ages, "%s has %d years alive.\n");
+    print_names_ages(count, names, ages, "%s is %d years old.\n");
+    print_names_ages(count, names, ages, "%s is %d years old again.\n");
+    print_names_ages(count, names, ages, "%s lived %d years so far.\n");
 
+    int i;
     char **arg = argv;
     for(i = 0; i < argc; i++) {
         printf("argument %d is '%s' (address = %p)\n", i, *arg, arg);