Added makefile. Fixed char pointer warnings

csoundbox.c

@@ -1,8 +1,15 @@
 #include <ao/ao.h>
 #include <mpg123.h>
+#include <stdlib.h>
+#include <stdio.h>
 
 #define BITS 8
 
+void exitfunction(void) {
+
+    printf("Exiting csoundbox.\n");
+}
+
 int main(int argc, char *argv[])
 {
     mpg123_handle *mh;
@@ -17,7 +24,8 @@ int main(int argc, char *argv[])
     ao_sample_format format;
     int channels, encoding;
     long rate;
-
+    
+    atexit(exitfunction);
     if(argc < 2)
         exit(0);
 
@@ -43,7 +51,7 @@ int main(int argc, char *argv[])
 
     /* decode and play */
     while (mpg123_read(mh, buffer, buffer_size, &done) == MPG123_OK)
-        ao_play(dev, buffer, done);
+        ao_play(dev, (char *)buffer, done);
 
     /* clean up */
     free(buffer);