K&R

K&R

Exercise 1-8. Write a program to count blanks, tabs, and newlines.

#include <stdio.h>

main()
{
    int blank, charac, tab, newline;
   
    blank = 0;
    tab = 0;
    newline = 0;
   
    printf("          | Blanks | Tabs | Newlines | \n");

    while((charac = getchar()) != EOF)
    {
        if(charac == ' ')
            {       
                ++blank;   
            }
        if(charac == '\t')
            {       
                ++tab;       
            }
        if(charac == '\n')
            {       
                ++newline;
                printf("| No. of: | %6d | %4d | %8d | \n", blank, tab, newline);
            }
    }
}

Exercise 1-9. Write a program to copy its input to its output, replacing each string of one or more blanks by a single blank.

#include <stdio.h>

main()
{
    int input_s, space, space_c;
   
    space = ' ';
    space_c = 0;
   
    while((input_s = getchar()) != EOF)
        {   
            if(input_s != space)
                {
                putchar(input_s);
                space_c = 0;
                }
            else if(input_s == space)
                {
                ++space_c;
                if(space_c == 1)
                    {
                    putchar(input_s);
                    }
                else if(space_c > 1)
                    {
                    --space_c;
                    printf("");
                    }
                }
        }
}

Using Cygwin --GCC 3.4.4, compile with following; -ansi -m32 -pedantic.

Comments on how to make it better, what is bad and what is good, please. (1.8 sucks I know.)

>>35
Switch only accepts constants as its cases, so it's supposed to be easier for compiler to generate faster code with switch.

using just main() is okay in C. It means you omit argc and argv, they're still there, but you don't use them; main() is not the same as main(void)