warning:gets function is dangerous [duplicate]

Question

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• Why is the gets function so dangerous that it should not be used? 11 answers

When i use gets function,gcc gives me a warning:

warning:the `gets' function is dangerous and should not be used.

Why gets and puts function dangerous?

Answer 1

Buffer overruns are dangerous. Here's the definition:

/* Get a line from the stdin stream. */
char *gets(char *buffer);

How big is the buffer? If a user types more data that can fit in the buffer, the program could crash and be susceptible to hacker exploits.