Question

Explain gets() and puts() functions of C language. Comment on their parameters and return values.

Answer 1

gets():

1. gets() function is used to scan a line of text from a standard input device.

2. This function will be terminated by a newline character.

3. The newline character won’t be included as part of the string. The string may include white space characters.

Syntax :char *gets(char *s);

4. This function is declared in the header file stdio.h.

5. It takes a single argument. The argument must be a data item representing a string. On successful completion, shall return a pointer to string s.

puts():

The C library function int puts(const char *str) writes a string to stdout up to  but not including the null character. A newline character is appended to the  output. Example: int puts(char const*str) Parameters: str-this is the C string to be written  Return value: If successful, non-negative value is returned. On error, the  function returns EOF.