How to write a function in c that counts words - c

Question

I had an exam yesterday in which one of the questions was about counting words in a given string.
The definition of word would be a portion of a string that is divided by spaces and/or the beginning/end of the string
I am new to C, and was not able to create a condition where it increases the counter word when you find “space (characters) space”
int count_words(char *str)
int i = 0;
int word = 2;
while (str[i])
{
if (str[i] == ‘ ‘)
{
int l = 1;
while (str[i + l]
{
l++;
}
if (l != 1)
{
word++;
}
}
}

Answer 1

For starters the function should be declared like
size_t count_words(const char *str);
The function parameter should be declared with the qualifier const because the passed string is not being changed within the function and the function return type should be size_t that is the same return type as for example of standard string function strlen.
It is unclear why the variable word in your function is initialized by 2
int word = 2;
Or the variable i is not being changed within the function.
The function can look the following way as shown in the demonstration program below
#include <ctype.h>
#include <string.h>
#include <stdio.h>
size_t count_words( const char *s )
{
size_t n = 0;
while ( *s )
{
while ( isspace( ( unsigned char )*s ) ) ++s;
if ( *s )
{
++n;
while ( *s && !isspace( ( unsigned char )*s ) ) ++s;
}
}
return n;
}
int main( void )
{
const char *s = "How to write a function in c that counts words";
size_t n = count_words( s );
printf( "The string \"%s\"\ncontains %zu words\n", s, n );
}
The program output is
The string "How to write a function in c that counts words"
contains 10 words
If to use as delimiters only the space character ' ' then the header <ctype.h> should be removed and the function will look like
size_t count_words( const char *s )
{
size_t n = 0;
while ( *s )
{
while ( *s == ' ' ) ++s;
if ( *s )
{
++n;
while ( *s && *s != ' ' ) ++s;
}
}
return n;
}
A more general function that can process any delimiters can look the following way
size_t count_words( const char *s, const char *delim )
{
size_t n = 0;
while (*s)
{
s += strspn( s, delim );
if (*s)
{
++n;
s += strcspn( s, delim );
}
}
return n;
}
The function has a second parameter that specifies delimiters. For example the function can be called loke
size_t n = count_words( s, " \t?!:;,." );

Answer 2

Try this way:
# include<stdio.h>
# include<string.h>
# define MaxBufferSize 50
void main(){
int count =0, size;
char str[MaxBufferSize+2];
printf("Enter string(max char 50 only): ");
if(fgets(str,sizeof(str), stdin)) {
if(strlen(str) > MaxBufferSize) printf("Max chars exceeded so chars before the limit were used!!!\n");
str[strcspn(str, "\n")] = '\0';
}
size = strlen(str);
int i=0;
if(size == 0) printf("Nothing entered\n");
else {
while(i<size){
while(!isalnum(str[i]) && i<size) i++;// ignores all spaces and other chars
if(str[i] == '\0') break;
while(isalnum(str[i]) && i<size) i++;// includes all words and numbers
count++;
}
printf("Words in string: %d\n",count);
}
}
hope it helps...! ;)

Answer 3

#include <stdio.h>
int count_words(char *str) {
int i, count=0;
int in_word = 0; // Flag to track if we're currently inside a word or not
// Loop through each character in the string
for(i=0; str[i]!='\0'; i++) {
// If current character is not a space or newline and we're not already inside a word, increment word count
if((str[i]!=' ' && str[i]!='\n') && !in_word) {
count++;
in_word = 1; // Set flag to indicate we're currently inside a word
}
// If current character is a space or newline, set flag to indicate we're not inside a word
else if(str[i]==' ' || str[i]=='\n') {
in_word = 0;
}
}
return count;
}

Answer 4

#include <stdio.h>
#include <string.h>
void main()
{
char s[200];
int count = 0, i;
printf("Enter the string:\n");
scanf("%[^\n]s", s);
for (i = 0;s[i] != '\0';i++)
{
if (s[i] == ' ' && s[i+1] != ' ')
count++;
}
printf("Number of words in given string are: %d\n", count + 1);
}
Use this code it will definitely works fine ):