Using ++ inside the sizeof keyword [duplicate]

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what's the mechanism of sizeof() in C/C++?

Hi,

I'm a TA for a university, and recently, I showed my undergraduate students the following C code from a C puzzle I found:

int i = 5;
int j = sizeof(i++);
printf("%d\n%d\n", i, j);

I just have one question: why is the output for i equal to 5, not 6? Is the ++ simply disregarded? What's going on here? Thanks!

c puzzle sizeof

задан Community 23 May 2017 в 11:55

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