count the number of words in c-string

[bigfisherman]

using a c-string how would you count words by the space?

[Browni3141]

Please give an attempt at a code before asking for help.

[bigfisherman]

#include <iostream>
#include <cstring>
using namespace std;

int countWords(char* one, int SIZE);

int main()
{
    //first array and size
    const int SIZE = 100;
    char one[SIZE];
    
    
    countWords(one, SIZE);
    
    
    system("pause");
    return 0;    
}



//first function
int countWords(char* one, int SIZE) //char array/pointer, length of array
{
    
    int count = 0; //integer for the word count
    
    while(*one != '\0')
    {
        if(*one == ' ')
        count++;
    }

    return count; //return the integer
  
}

[Browni3141]

one always points to the first letter in the string.

[bigfisherman]

can you explain that a bit more please? thanks!

[Zeillinger]

In your loop, you should increase one or it will always point to the same character, the first one.

[bigfisherman]

so I would change count++ to one++?

[Moschops]

If you did that, how would you know how many words there were? You're awfully close to the solution... :)

[Athar]

You should try to actually understand the code you're dealing with.
I would suggest rereading the chapter about pointers.

[bigfisherman]

I have read the chapter multiple times. words are formed by adding a space, I thought I was counting the number of spaces to find the number of words.

[Athar]

Yes, but one points to the string's first character and you don't ever change that.
So it counts the number of spaces in the first character. Forever.

[Moschops]

You need to move the pointer along the string to look for the spaces, and each time you find a space, you need to add one to your total.

"Your total" and "the pointer that you move along the string" are two completely different things.

[bigfisherman]

AHH so I need to increment the "one" in order to move it a long the string!

[bigfisherman]

Having an awful time getting the total of words to output in the last function. anyone have any ideas?

#include <iostream>
#include <cstring>
using namespace std;

int countWords(char* one, int SIZE);
int addDigits();
void outputArrays(char* one, int SIZE);

int main()
{
    //first array and size
    const int SIZE = 100;
    char one[SIZE];
    
    char two[SIZE];
    
    //prompt to enter a sentence for the first array
    cout << "Enter a sentence of at least two words:" << endl;
    //get input for the first array  
    cin >> one;
    cout << endl << endl;
    
    //prompt to enter digits
   
    
    
    //use function strlen() to find length or number of sig chars in arrays
    
    
    //call the first function
    countWords(one, SIZE);
    
    int count;
    
    //call the second function
    addDigits();
    
    
    //call the output function
    outputArrays(one, SIZE);
    
    
    system("pause");
    return 0;    
}



//first function
int countWords(char* one, int SIZE) //char array/pointer, length of array
{
    int count = 0; //integer for the word-count, used as total
    
    while(*one != '\0')
    {
        if(*one == ' ')
        one++;   //increment the pointer
        count++; //increment the total
    }

    return count; //return the integer - number of words
}


//second function
int addDigits()
{
            
    
}



void outputArrays(char* one, int SIZE)
{
    cout << "The total number of words is: " << one; 
    
}
#include <iostream>
#include <cstring>
using namespace std;

int countWords(char* one, int SIZE);
int addDigits();
void outputArrays(char* one, int SIZE, int count);

int main()
{
    //first array and size
    const int SIZE = 100;
    char one[SIZE];
    
    char two[SIZE];
    
    //prompt to enter a sentence for the first array
    cout << "Enter a sentence of at least two words:" << endl;
    //get input for the first array  
    cin >> one;
    cout << endl << endl;
    
    //prompt to enter digits
   
    
    
    //use function strlen() to find length or number of sig chars in arrays
    
    
    //call the first function
    countWords(one, SIZE);
    
    int count;
    
    //call the second function
    addDigits();
    
    
    //call the output function
    outputArrays(one, SIZE, count);
    
    
    system("pause");
    return 0;    
}



//first function
int countWords(char* one, int SIZE) //char array/pointer, length of array
{
    int count = 0; //integer for the word-count, used as total
    
    while(*one != '\0')
    {
        if(*one == ' ')
        one++;   //increment the pointer
        count++; //increment the total
    }

    return count; //return the integer - number of words
}


//second function
int addDigits()
{
            
    
}



void outputArrays(char* one, int SIZE)
{
    cout << "The total number of words is: " << one; 
    
}

[userulluipeste]

You might want to look at string tokenize:
http://www.cplusplus.com/reference/clibrary/cstring/strtok/