K&R C Program Exercise 1-13

K and R C Programs Exercises provides the solution to all the exercises in the C Programming Language, second addition, by Brian W.Keringhan and Dennis M.Ritchie(Prentice Hall,1988). You can learn and solve K&R C Programs Exercise. K and R solution to print a histogram of the lengths of words in its input. Read more about C Programming Language .

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#include <stdio.h>

#define MAXLN 10

int main(void)
{
int c;
int inspace = 0;
long lengtharr[MAXLN + 1];
int wordlen = 0;

int firstletter = 1;
long value = 0;
long maxval = 0;
int index = 0;
int done = 0;

for(index = 0; index <= MAXLN; index++)
{
lengtharr[index] = 0;
}

while(done == 0)
{
c = getchar();

if(c == ' ' || c == 't' || c == 'n' || c == EOF)
{
if(inspace == 0)
{
firstletter = 0;
inspace = 1;

if(wordlen <= MAXLN)
{
if(wordlen > 0)
{
value = ++lengtharr[wordlen - 1];
if(value > maxval)
{
maxval = value;
}
}
}
else
{
value = ++lengtharr[MAXLN];
if(value > maxval)
{
maxval = value;
}
}
}
if(c == EOF)
{
done = 1;
}
}
else
{
if(inspace == 1 || firstletter == 1)
{
wordlen = 0;
firstletter = 0;
inspace = 0;
}
++wordlen;
}
}

for(value = maxval; value > 0; value--)
{
printf("%4d | ", value);
for(index = 0; index <= MAXLN; index++)
{
if(lengtharr[index] >= value)
{
printf("* ");
}
else
{
printf(" ");
}
}
printf("n");
}
printf(" +");
for(index = 0; index <= MAXLN; index++)
{
printf("---");
}
printf("n ");
for(index = 0; index < MAXLN; index++)
{
printf("%2d ", index + 1);
}
printf(">%dn", MAXLN);

return 0;
}
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One comment on “K&R C Program Exercise 1-13

  • Hi…
    It's really a nice doing by sharing this kind of good programming solutions to learn from it….

    Here is 1 that I had written in attempt minimize the size , Hope that it would b helpful…
    ***************************************************

    #include
    #define IN 1 /* inside a word */
    #define OUT 0 /* outside a word */

    /* Exercise 1-13. Write a program to print a histogram of the lengths of words in its input. It is
    easy to draw the histogram with the bars horizontal; a vertical orientation is more challenging.
    */

    // VERTICAL ORIENTATION

    int main()
    {
    int c,nw, nc, state;
    int i,j; //Counters
    int nchar[100],maxlen=0; /*for holding peak value of no. of char; For max. lenght of a word*/
    state = OUT;
    nw = nc = 0;
    while ((c = getchar()) != EOF)
    {
    ++nc;

    if (c ==' ' || c =='n' || c =='t')
    {
    nc=nc-1;
    if(state == IN)
    {
    nchar[nw]=nc;
    if(nc > maxlen)
    maxlen = nc;
    nc=0;
    }
    state = OUT;
    }
    else if (state == OUT)
    {
    state = IN;
    ++nw;
    }
    }

    printf("nThe Histogram of the lengths of words:n");
    for(i=maxlen ; i>=0 ; i–)
    {
    for(j=1 ; j<= nw ; j++)
    {
    if(nchar[j] > i)
    putchar('*');
    else
    putchar(' ');
    }
    putchar('n');
    }
    return 0;
    }

    Reply

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