Alternate printf() function

[leojose]

Hi all,

I am faced with a tricky issue and would very much like somebody to either give me a solution or some useful pointers.

I would like to add a feature in my program that will 'bypass' the printf() calls if a particular condition is not met. Now I may have a lot of printf()s all over the program so checking for the condition near each such function is not a feasible option.
My code should look something like this

PRINT(*parameter*)
{
#ifndef CONDITION
printf(*parameter*)
#endif
}

void main()
{
PRINT(*anything can go in here*);
}

I am open to any other ideas.

Thanks,
Leo

[SuperKoko]

Yes, it's possible.
You can write a variadic function, using <stdarg.h> in a C program or <cstdarg> in a C++ program.

#include <stdarg.h>

int print(const char* Format, ...) {
  if (condition) {
    va_list ls;
    int r;
    
    va_start(ls, Format);
    r=vprintf(Format, ls);
    va_end(ls);
    return r;
  }
  return 0;
}

Have a look at:
http://www.cppreference.com/stdio/vp..._vsprintf.html
PS: "void main()" is not a correct prototype for the main function. You should use "int main()".

[leojose]

Thanks SuperKoko...it works just as expected!