Problem with the code to count the word length if you have many words (sentence)

I have problem to write code to following example:

print on screen - Enter setence (some text)
read from screen - setence (text)

While - not end of file (or something like that)

how many characters ? have the longest word (from setence)

print on screen "Longest word have XX characters"

grateful if you can help me and show me the code for this problem, (I tried for hours with no success)

oldman from Europe

You could make use of strtok() to tokenize the sentence into separate words and then use strlen() to determine which is the longest.

> I have problem to write code to following example:
So show us which bits you can do (like print a prompt, read a line) and then comment where the bits you can't do should go.
That way, we don't explain stuff you already know.

I have tried this following code with errors but I must have mistaken something: (you can improve it)

Code:

---

#include <stdio.h>
#include <stdlib.h>
#define MAXLEN 100
#define TRUE 1

int main(void)
{
 
  char string[MAXLEN];
 
  int i, j, length = 0, maxlength = 0;
 
  system("cls");
 
  printf("Enter your name, address, city and state or some text\n");
  gets(string);
 
   
  while(i = 0; string[i] != '\0'; i++)
  {
 
   
    for(j = 0; string[j] != ' '; j++)  *I think this is not right*
    {                                                   
      length++;
      if(length > maxlength)
        maxlength = length;
    }
 
  string[j]++;
 
  }
 
 
  printf("Longest word have %d chracters\n", maxlength);
 
  system("PAUSE");

  return 0;
}

---

Ok, this is what I meant:

Code:

---

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

#define DELIM " \n\t"

int main(void)
{
    char input[BUFSIZ];
    printf("Enter a sentence: ");
    fgets(input, sizeof(input), stdin);

    char *token = NULL;
    token = strtok(input, DELIM);

    int len = 0;
    char *longest = NULL;
    while (token != NULL)
    {
        if (strlen(token) > len)
        {
            len = strlen(token);
            longest = token;
            token = strtok(NULL, DELIM);
        }
    }
    printf("Longest word: %s has %d characters.\n", longest, len);
    return EXIT_SUCCESS;
}

---

Meh, Nessarose is posting C++ code on the C board.

> gets(string);
Use fgets() as Nessarose has done.

> while(i = 0; string[i] != '\0'; i++)
You're mixing a while loop and a for loop here.

> length++;
Looks good.
But you need to reset it back to 0 when you reach the end of a word.

> string[j]++;
Why would you want to increment a character in the string?

Code:

---

while ( string[i] != '\0' ) {
  while ( string[i] != ' ' && string[i] != '\0' ) {
    // something
    i++;
  }
}

---