C - 查找句子中最长的单词

Question

Hi I have this program that reads a text file line by line and it's supposed to output the longest word in each sentence. Although it works to a degree, it's overwriting the biggest word with an equally big word which is something I am not sure how to fix. What do I need to think about when editing this program? Thanks

//Program Written and Designed by R.Sharpe
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include "memwatch.h"

int main(int argc, char** argv)
{
    FILE* file;
    file = fopen(argv[1], "r");
    char* sentence = (char*)malloc(100*sizeof(char));
    while(fgets(sentence, 100, file) != NULL)
    {
        char* word;
        int maxLength = 0;
        char* maxWord;
        maxWord = (char*)calloc(40, sizeof(char));
        word = (char*)calloc(40, sizeof(char));
        word = strtok(sentence, " ");
        while(word != NULL)
        {
            //printf("%s\n", word);
            if(strlen(word) > maxLength)
            {
                maxLength = strlen(word);
                strcpy(maxWord, word);
            }
            word = strtok(NULL, " ");
        }
        printf("%s\n", maxWord);
        maxLength = 0; //reset for next sentence;
    }

    return 0; 
}

My textfile that the program is accepting contains this

some line with text 
another line of words 
Jimmy John took the a apple and something reallyreallylongword it was nonsense

and my output is this

text

another
reallyreallylongword

but I would like the output to be

some
another
reallyreallylongword

EDIT: If anyone plans on using this code, remember when you fix the newline character issue don't forget about the null terminator. This is fixed by setting sentence[strlen(sentence)-1] = 0 which in effect gets rid of newline character and replaces it with null terminating.

Answer 1

You get each line by using

fgets(sentence, 100, file)

The problem is, the new line character is stored inside sentence . For instance, the first line is "some line with text\\n" , which makes the longest word "text\\n" .

To fix it, remove the new line character every time you get sentence .