The gets function calls the getchar function to read a line of characters into string. The line consists of all characters up to and including the first newline character ('\n'). The newline character is replaced by a null character ('\0') in string.

The len argument specifies the maximum number of characters that may be read. If len characters are read before a newline is encountered, the gets function terminates string with a null character and returns.

Note

• This function is implementation-specific and is based on the operation of the _getkey and putchar functions. These functions, as provided in the standard library, read and write characters using the microcontroller's serial port. Custom functions may use other I/O devices.

The gets function returns string.

puts

#include <stdio.h>

void tst_gets (void) {
  char buf [21];

  do {
    gets (buf, sizeof(buf)-1);
    printf ("Input string \"%s\"", buf);
  } while (buf [0] != '\0');
}