C Programming

FORMATTERS FOR STRINGS/CHARACTERS
Consider the following program.

	#include <stdio.h>

	main()    /* FORMATS.C   */
	{
		char          c = '#';
		static char s[] = "helloandwelcometoclanguage";

		printf("Characters:\n");
		printf("%c\n", c);
		printf("%3c%3c\n", c, c);
		printf("%-3c%-3c\n", c, c);
		printf("Strings:\n");
		printf("%s\n", s);
		printf("%.5s\n", s);
		printf("%30s\n", s);
		printf("%20.5s\n", s);
		printf("%-20.5s\n", s);
	}

The output of the above program will be,

 Characters:
 #
   #  #
 #  #
 Strings:
 helloandwelcometoclanguage
 hello
     helloandwelcometoclanguage
                hello
 hello

The statement printf("%.5s\n",s) means print the first five characters of the array s. The statement printf("%30s\n", s) means that the array s is printed right justified, with leading spaces, to a field width of thirty characters.

The statement printf("%20.5s\n", s) means that the first five characters are printed in a field size of twenty which is right justified and filled with leading spaces.

The final printf statement uses a left justified field of twenty characters, trailing spaces, and the .5 indicating to print the first five characters of the array s.

©Copyright B Brown. 1984-1999. All rights reserved.