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Asked: 2026-05-30T04:07:13+00:00

I do know that include guards are to prevent redefinition. But does function prototype

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I do know that include guards are to prevent redefinition. But does function prototype needs include guards too (supposedly that function prototype is defined in a header and used in multiple related programs)?

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  1. Editorial Team

    Declarations aren’t definitions, so you can repeat declarations as many times as you want. E.g. a file with just:

    int f(int);
int f(int);
int f(int);
int f(int);

    is totally legal.

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