Solution for Exercise 13-1

ex1301

#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,alpha,space,punct;

    alpha = space = punct = 0;

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

    /* print results */
    printf("\"%s\"\n",phrase);
    puts("Statistics:");
    printf("%d alphabetic characters\n",alpha);
    printf("%d spaces\n",space);
    printf("%d 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

* If you copy and paste this text into your editor, ensure that the phrase[] variable at Line 6 appears as a single line. Do not break it up! I've split the line above so that it fits well on this web page. Otherwise, it would be about three feet long and make the page all ugly.

* It's the index++; statement at Line 22 that moves the while loop through each character in the string.

* The printf() statement at Line 26 contains a few escape sequences. The \" is required to stick a double quote in the output, which quotes the string stored in phrase[].

Exercise ex1302 →