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#include <stdio.h> a gets an Deep C

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#include <stdio.h> a gets an undefined valuevoid foo(void) I don’t get a warning when compiling it,{ and I do get 42 int a = 41; a = a++; printf("%dn", a); Then you must increase the warning level,} the value of a is certainly undefined after the assignment and increment because youint main(void) violate one of the fundamental rules in C{ (and C++). The rules for sequencing says foo(); that you can only update a variable once} between sequence points. Here you try to update it two times, and this causes a to become undefined. So you say a can be whatever? But I do get 42Indeed! a can be 42, 41, 43, 0, 1099, or whatever... I am not surprised that your machine givesyou 42... what else can it be here? Or perhaps the compiler choose 42 whenever a value isundefined ;-)

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