--- a/test/sign/sign.c	Wed Feb 02 11:03:06 2022 +0100
+++ b/test/sign/sign.c	Wed Feb 02 12:55:23 2022 +0100
@@ -26,20 +26,19 @@
 
 #include "dyncall.h"
 
-// This program demonstrates the need for 'unsigned' integers and the
-// ability to implement zero/sign extensions for small integers.
-// This test program indicates failure on powerpc 32-bit with
-// compiler optimizations enabled (e.g. '-O2' compilation flags).
-//
-// A fix to be incorporated in the API is also given.
-//
+/* This program demonstrates the need for 'unsigned' integers and the */
+/* ability to implement zero/sign extensions for small integers.      */
+/* This test program indicates failure on powerpc 32-bit with         */
+/* compiler optimizations enabled (e.g. '-O2' compilation flags).     */
+/*                                                                    */
+/* A fix to be incorporated in the API is also given.                 */
 
 int add1s(unsigned short x) { return x + 1; }
 
-// API BUGFIX:
+/* API BUGFIX: */
 #define dcArgUShort(vm,x) dcArgInt(vm,(int)(unsigned int)(x))
 
-// OLD TEST: int add1(unsigned char x) { return x + 1; }
+/* OLD TEST: int add1(unsigned char x) { return x + 1; } */
 
 int main(int argc, char* argv[])
 {
@@ -55,9 +54,8 @@
   printf("result: sign: %d\n", total); 
  
   if (!total) {
-    //
-    // TEST BUGFIX: use instead..
-    //
+
+    /* TEST BUGFIX: use instead.. */
     dcReset(vm);
     dcArgUShort( vm, 0xFFFF );
     result = dcCallInt( vm, &add1s );
@@ -65,14 +63,15 @@
     printf("result: sign (bugfix): %d\n", total); 
   }
   
-  // result = dcCallInt( vm, &add1s );
-  // total = (result == 0x10000);
+  /*result = dcCallInt( vm, &add1s );
+  total = (result == 0x10000);*/
   
-  // OLD TEST: updated to using 'short'
-  // dcArgChar( vm, (char) 255 );
-  // result = dcCallInt( vm, &add1 );
-  // total = (result == 256);
+  /*OLD TEST: updated to using 'short'
+  dcArgChar( vm, (char) 255 );
+  result = dcCallInt( vm, &add1 );
+  total = (result == 256);*/
   
-  // printf("result: sign: %d\n", total); 
+  /*printf("result: sign: %d\n", total); */
   return 0;
 }
+