User defined printf output conversions for Windows?

Question

I'd like to define my own printf output conversions:

printf("%T", widget);

For gcc, I can use printf.h as shown here .

How can I do this for Windows (Visual Studio)?

Answer 1

This is a "bad idea" (tm) - it is much, much easier. more sensible, more portable and more maintainable to write an ordinary function to do the conversion. For example (assuming widget has an id and a name):

void PrintWidget( Widget * w ) {
    printf( "widget id %d name %s " , w->id, w->name );
}

Answer 2

与其让printf进行转换，不如为您的对象提供一个转换为字符串并让printf正常输出字符串的printf 。