[C] How to define one macro define in C language

#define Bingo(format, args...) sprintf(buf2, format, ## args); strcat(buf,buf2)

Two way to use

1. Bingo("%d", happy);

2. Bingo("You did a good job");

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More example:

#define CHECK_ASSIGN(iface, fn, p_fn)                           \
    if ( (iface) && (iface->fn) )                                       \
    {                                                                   \
        p_fn = iface->fn;                                               \
    }