3. Word Counter Write a function that accepts a pointer to a C-string as an argu

Question

3. Word Counter

Write a function that accepts a pointer to a C-string as an argument and returns the

number of words contained in the string. For instance, if the string argument is “Four

score and seven years ago” the function should return the number 6. Demonstrate the

function in a program that asks the user to input a string and then passes it to the function.

The number of words in the string should be displayed on the screen. Optional

Exercise: Write an overloaded version of this function that accepts a string class object

as its argument.

c++

Explanation / Answer

//hi!!

// code starts from here... use any C compiler or C++ microsoft complier.

#include <stdio.h> // main library function for input and output

extern unsigned countWords(char *str); // extern:storage type globally defined this function to call anywhere

int main(void)
{
    char str[] = " American sniper 007 "; //type your string here
    printf(" User typed words: %s ", str );
    printf(" Number of words contained in the string: %u ", countWords(str));
    return 0;
}

#define OUT 0     // the preprocessor command used for count the words in Character input
#define IN 1     // the preprocessor command used for count the words

// returns number of words in str
unsigned countWords(char *str)
{
    int state = OUT;
    unsigned wc = 0; // word count

    // Scan all characters one by one
    while (*str)
    {
        // If next character is a separator, set the
        // state as OUT
        if (*str == ' ' || *str == ' ' || *str == ' ')
            state = OUT;

        // If next character is not a word separator and
        // state is OUT, then set the state as IN and
        // increment word count
        else if (state == OUT)
        {
            state = IN;
            ++wc;
        }

        // Move to next character
        ++str;
    }

    return wc;
}

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