From 764b6e2a3e8052ff2b4ce732963e6add97aa5291 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Mon, 28 Mar 2016 16:45:13 +1300
Subject: Tinkering with function pointers

---
 funcptr.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 funcptr.c

(limited to 'funcptr.c')

diff --git a/funcptr.c b/funcptr.c
new file mode 100644
index 0000000..de77066
--- /dev/null
+++ b/funcptr.c
@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int doub(int);
+int trip(int);
+int half(int);
+void fpv_exec(int (**fpv)(int), int n);
+
+int doub(int i) {
+    return i * 2;
+}
+
+int trip(int i) {
+    return i * 3;
+}
+
+int half(int i) {
+    return i / 2;
+}
+
+void fpv_exec(int (**fpv)(int), int n) {
+    int i;
+    for (i = 0; *(fpv + i) != NULL; i++) {
+        printf("%d\n", (*(fpv + i))(n));
+    }
+}
+
+int main(int argc, char **argv) {
+    int (**fpv)(int);
+    fpv = calloc(4, sizeof(int (*)(int)));
+
+    fpv[0] = doub;
+    fpv[1] = trip;
+    fpv[2] = half;
+    fpv[3] = NULL;
+
+    for (argv++, argc--; argc; argv++, argc--) {
+        fpv_exec(fpv, atoi(*argv));
+    }
+
+    exit(EXIT_SUCCESS);
+}
+
-- 
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