printf insufficient arguments

Question

My question is about the behavior after a printf with a missing argument:

printf(\"%s blah blah %d\", int); // integer was given as argument (and not int wri         


        

Answer 1

It is undefined for the whole program.

In fact it is undefined before even the program exists: it is undefined what the compiler itself does in presence of the text printf("%s blah blah %d", int);