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in C, what is the proper way to define a printf like macro that will print only when DEBUG symbol is defined?
#ifdef DEBUG #define DEBUG_PRINT(???) ??? #else #define DEBUG_PRINT(???) ??? #endif where ??? is where I am not sure what to fill in
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Yes - it's known as printf() debugging, named after the ubiquitous C function: Used to describe debugging work done by inserting commands that output more or less carefully chosen status information at key points in the program flow, observing that information and deducing what's wrong based on that information.
Open up a source file from your manage project in Visual Studio and set a breakpoint on a line. Start debugging in Visual Studio by pressing F5. In Excel, open up your worksheet and start debugging your VBA code using Excel's debugger.
I've seen this idiom a fair amount:
#ifdef DEBUG # define DEBUG_PRINT(x) printf x #else # define DEBUG_PRINT(x) do {} while (0) #endif Use it like:
DEBUG_PRINT(("var1: %d; var2: %d; str: %s\n", var1, var2, str)); The extra parentheses are necessary, because some older C compilers don't support var-args in macros.
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