A simple MACRO to implement a debug printf
During normal coding stage, often I need to put some prints to reach a fast debug of my code. At the same time, I want to see how the code works without these prints.
Naturally I don't want to remove all prints and then add them again.
I have two solutions for this problem:
First solution:
I can add a #define as follows:
#define DEBUG
and then each time I want to print debug information I can use the "#ifdef #endif" construct. For example:
#ifdef DEBUG printf("debug info number 1\n");#endif................. // some stuff
#ifdef DEBUG printf("debug info number 2\n");#endifto remove the debug prints, I only need to remove "#define DEBUG" from my code.
Second solution:
I can add a #define as follows:
#define DEBUG
then I can define a new MACRO as follows:
#ifdef DEBUG#define PRINTD printf#else#define PRINTD(format, args...) ((void)0)#endifand then each time I want to print debug information I can use the new PRINTD macro. For example:
PRINTD ("debug info number 1\n");................. // some stuff
PRINTD ("debug info number 2\n");to remove the debug prints, I only need to remove "#define DEBUG" from my code.
This second solution is my favourite one because the code is cleaner than the code in the first solution
Gg1
Pingback: Una semplice macro che implementa una printf di debug | Microprogrammo
For those working with older C compilers that don't support variable macro arguments, you can do this:
#ifdef DEBUG
#define PRINTD(x) printf
#else
#define PRINTD(x) (void(0))
#endif
PRINTD(("Hello debugger\n"));
PRINTD(("The number you dialed, %u, is not in service\n", 911));
oops that should be
#define PRINTD(x) printf x