DMP - Chapter 4

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Character Strings and Formatted I/O

• char Arrays and NULL (\0) character
• String constants
• strlen()
• Preprocessor directives (e.g. #include, #define) and constants
• #if 0, #endif
• <stdio.h> and "local.h"
• Conversion specifiers: %i %p %s
• Modifers (flag, digits)
• - left-justified, e.g. %-20s
• + plus or minus sign
• space leading space
• # alternative form
• 0 leading zeros
• x.y Minimum width, precision (min. # of digits)
• %s max number of characters

#include <stdio.h>
#define DAYS 365
#define RENT 1234.56
#define AGE  31
#define BLURB "Digtal Music"

void main(void)
{
        printf("/%d/\n", DAYS);
        printf("/%2d/\n", DAYS);
        printf("/%10d/\n", DAYS);
        printf("/%-10d/\n", DAYS);

        printf("/%f/\n", RENT);
        printf("/%e/\n", RENT);
        printf("/%4.2f/\n", RENT);
        printf("/%3.1f/\n", RENT);
        printf("/%10.3f/\n", RENT);
        printf("/%10.3e/\n", RENT);
        printf("/%+4.2f/\n", RENT);
        printf("/%010.2f/\n", RENT);

        printf("%x %X %#x %#X\n", AGE, AGE, AGE, AGE);
        printf("**%+d**% d**%+d**% d\n", AGE, AGE, -AGE, -AGE);
        printf("**%5d**%5.3d**%05d**%05.3d**\n", AGE, AGE, AGE, AGE);

        printf("/%2s/\n", BLURB);
        printf("/%12s/\n", BLURB);
        printf("/%12.5s/\n", BLURB);
        printf("/%-12.5s/\n", BLURB);
        printf("/%  12s/\n", BLURB);
}

Find the errors:

include <stdio.h>
main
(
        float g; h;
        float tax, rate;

        g = e21;
        tax = rate * g;
)

Find the errors:

void main(int) / this program is perfect / 

{ 
cows, legs integer; 

printf("How many cow legs did you count\n); 
scanf("%c", legs); 
cows = legs / 4; 
printf("That imples there are %f cows.\n", cows);

}