Sams Teach Yourself C in 21 Days

Example 2 Output

This prints a character, z

a number, 123

a floating point, 456.789

156 Day 7

,

,

You may notice in the second example, that the printf()function is using a

string that wraps to a second line. At the end of the first line a forward

slash(\)is used to indicate that the string continues to the next line. The

compiler will treat the two lines as one.

Tip

Displaying Messages with puts()................................................................

Theputs()function can also be used to display text messages on the screen, but it can’t

display numeric variables. The puts()function takes a single string as its argument and

displays it, automatically adding a new line at the end. For example, the statement

puts(“Hello, world.”);

performs the same action as

printf(“Hello, world.\n”);

You can include escape sequences (including \n) in a string passed to puts(). They have

the same effect as when they are used with printf()(see Table 7.1 for the most com-

mon escape sequences).

Just like printf(), any program that uses puts()should include the header file stdio.h.

Note that stdio.h should be included only once in a program.

DOuse the puts()function instead of

theprintf()function whenever you

want to print text but don’t need to

print any variables.

DON’Ttry to use conversion specifiers

with the puts()statement.

DO DON’T

Theputs()Function

#include <stdio.h>

puts( string );

puts()is a function that copies a string to the standard output device, usually the display

,screen. When you use puts(), include the standard input/output header file (stdio.h).

S

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