argv[argc] ==?

My professor and a couple of students are arguing about whether argv is null terminated or not. My friend wrote a small program and it printed out null but another kid said that he is pro开发者_Go百科bably simply reading into blank memory. Can someone solve this discussion?

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From the Standard:

5.1.2.2.1 Program startup
...
-- argv[argc] shall be a null pointer.

So, yes; argv is null terminated

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According to the standard, "argv[argc] shall be a null pointer" (5.1.2.2.1).