| 8.3. I/O functions for data types | ||
|---|---|---|
 | Chapter 8. Input and output functions |  |
| 8.3. I/O functions for data types | ||
|---|---|---|
| | Chapter 8. Input and output functions | |
Instead of reading in character by character from the user
input, you can read a single data type at a time, such as integers, strings,
etc. To do so, C provides you with the gets function, which
reads strings, and the scanf function, which reads another
basic data types. In the same way, we can write out strings with
puts and other data types at once with the printf
function. We have already seen this function, but here you are going to see
some further details about it.
gets function
To read character by character from the input we have
getc and getchar functions. We can also read
line by line with several functions; one of them is
gets:
#include <stdio.h> char *gets(char *s);
Here the characters read from the standard input stream
are stored in the character array identified by s. The
gets function stops reading, and appends a null character
'\0' to the array, when a newline or end-of-file (EOF) character is
encountered. The function returns s if it concludes
successfully. Otherwise, a null pointer is returned.
| |  | |
8.2.4.
The putchar function
|  | 8.3.2.
The puts function
|