What is the usage of fgets function in C language?

c language fgets function usage: fgets() function is used to read a line or a specified number of characters from the file stream.

The syntax is:

char * fgets(char * string, int size, FILE * stream);

Parameter description:

s: Character pointer, pointing to the buffer that stores the read data District address.

n: Read n-1 characters from the stream

stream: Points to the read stream.

Return value:

(1) When n<=0, return NULL, that is, a null pointer.

(1) When n=1, return the empty string "".

(1) If the read is successful, the address of the buffer is returned.

(1) If there is a read error or end-of-file (EOF) is encountered, NULL is returned.

*Note: fgets() is different from gets(), not only because the gets() function has only one parameter FILE *stream, but more importantly, fgets() can specify the maximum read string number, eliminating the problem of buffer overflow caused by improper use of gets()

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