Solution for Exercise 13-13

ex1313

#include <stdio.h>
#include <ctype.h>

int main()
{
    char phrase[] = "When in the Course of human events, it becomes
necessary for one people to dissolve the political bands which have
connected them with another, and to assume among the powers of the
earth, the separate and equal station to which the Laws of Nature
and of Nature's God entitle them, a decent respect to the opinions
of mankind requires that they should declare the causes which impel
them to the separation.";

    int index;
    int alpha,blank,punct;

    alpha = blank = punct = 0;

/* gather data */
    index = 0;
    while(phrase[index])
    {
        if(isalpha(phrase[index]))
            alpha++;
        if(isblank(phrase[index]))
            blank++;
        if(ispunct(phrase[index]))
            punct++;
        index++;
    }

/* print results */
    printf("\"%s\"\n",phrase);
    puts("Statistics:");
    printf("%4d alphabetic characters\n",alpha);
    printf("%4d blanks\n",blank);
    printf("%4d punctuation symbols\n",punct);

    return(0);
}

Output

"When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God entitle them, a decent respect to the opinions of mankind requires that they should declare the causes which impel them to the separation."
Statistics:
330 alphabetic characters
70 spaces
6 punctuation symbols

Notes

* As I wrote in the notes for Exercise 13-1, the text for the phrase[] variable is broken between several lines. If you copy and paste this code into an editor, delete the line breaks so that you have one, long unbroken string of text.

* The only major difference between this code and the solution for Exercise 13-1 is the modification of the %d placeholders in the final three printf() statements from %d to %4d.

* I could have used %3d just as easily as %4d, but the latter allows for one extra character of padding..

Exercise ex1314 →