C program to count the total number of words in the given string

In this article, we will discuss the concept of C program to count the total number of words in the given string

In this post, we are going to learn how to count the total number of words in the given string in C programming language

Program to count the total number of words using for loop

The program allows the user to enter a string thereafter It counts the total words of the string using for loop in C language

Program 1

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char str[100];
    int count,i,words=1;

    printf("Enter a string for count words\n");
    gets(str);//store the string vlue gets from user
    count=strlen(str);
    for(i=0; i<count; i++){
        if(str[i]!=' ' && str[i+1]==' ')
            words=words+1;
    }
    printf("Total words of the given string: %d ",words);
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter a string for count words
C is a procedural language
Total words of the given string: 5

Approach

Declare a character array as char str[100];
Declare and initialize an integer variable as int i ,count,words=0;
The user asked to enter a string to count words
Calculate the length of the given string using strlen() function and assign the length to count variable
A for-loop is used to count the total words of the given string
It is initialized as i=0, and checks condition whether i<count, and executes the loop until the given condition becomes true
Use an if condition to test if(str[i]!=’ ‘ && str[i+1]==’ ‘), if it is true, words becomes words + 1(words=words+1)
Finally, the program displays the total number of the words using the words variable

Program to count the total number of words using while loop

The program allows the user to enter a string thereafter It counts the words of the string using while loop in C language

Program 2

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char str[100];
    int count,i,words=1;

    printf("Enter a string for count words\n");
    gets(str);
    count=strlen(str);
    i=0;
    while(i<count){
        if(str[i]!=' ' && str[i+1]==' ')
            words=words+1;
             i++;
    }
    printf("Total words of the given string: %d ",words);
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter a string for count words
C is supporting structured programming
Total words of the given string: 5

Approach

Declare a character array as char str[100];
Declare and initialize an integer variable as int i ,count,words=0;
The user asked to enter a string to count words
Calculate the length of the given string using strlen() function and assign the length to count variable
A while-loop is used to count the total words of the given string
It is initialized as i=0, and checks condition whether i<count, and executes the loop until the given condition becomes true
Use an if condition to test if(str[i]!=’ ‘ && str[i+1]==’ ‘), if it is true, words becomes words + 1(words=words+1)
i is incremented by 1
Finally, the program displays the total number of the words using the words variable

Program to count the total number of words using do-while loop

The program allows the user to enter a string thereafter It counts the words of the string using do-while loop in C language

Program 3

#include <stdio.h>
#include <stdlib.h>

int main()
{
    char str[100];
    int count,i,words=1;

    printf("Enter a string for count words\n");
    gets(str);
    count=strlen(str);
    i=0;
    do{
        if(str[i]!=' ' && str[i+1]==' ')
            words=words+1;
             i++;
    }while(i<=count);
    printf("Total words of the given string: %d ",words);
    getch();
    return 0;
}

When the above code is executed, it produces the following result

Enter a string for count words
C language is not supported OOP concept
Total words of the given string: 7

Approach

Declare a character array as char str[100];
Declare and initialize an integer variable as int i ,count,words=0;
The user asked to enter a string to count words
Calculate the length of the given string using strlen() function and assign the length to count variable
A do-while loop is used to count the total words of the given string
It is initialized as i=0, and checks condition whether i<count, and executes the loop until the given condition becomes true
Use an if condition to test if(str[i]!=’ ‘ && str[i+1]==’ ‘), if it is true, words becomes words + 1(words=words+1)
i is incremented by 1(i=i+1)
Finally, the program displays the total number of the words using the words variable