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You can't have any of these:

• a function can't return a function, so you'll never see foo()()
• a function can't return an array, so you'll never see foo()[]
• an array can't hold a function, so you'll never see foo[]()

You can have any of these:

• a function returning a pointer to a function is allowed: int (* fun())();
• a function returning a pointer to an array is allowed: int (* foo())[]
• an array holding pointers to functions is allowed: int (*foo[])()
• an array can hold other arrays, so you'll frequently see int foo[][]

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