c - 查找字符串中最长的单词

Question

我对 C 编码很陌生。我已经编写了代码来查找字符串中最长的单词。我的代码没有显示任何错误，但它打印了一个带有不在字符串中的奇怪字符的单词。你能告诉我我的代码有什么问题吗？谢谢

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

char LongestWord (char GivenString[100]);

int main()
{
    char input[100];
    char DesiredWord[20];

    printf("please give a string:\n");
    gets(input);
       DesiredWord[20]=LongestWord(input);

    printf("longest Word is:%s\n",DesiredWord);

    return 0;
}

char LongestWord (char GivenString[100]){
    //It is a predefined function, by using this function we can clear the data from console (Monitor).
    //clrscr()
    int position1=0;
    int position2=0;
    int longest=0;
    int word=0;
    int Lenght=strlen(GivenString);
    char Solution[20];
    int p=0;

    for (int i=1; i<=Lenght; i++){
        if (GivenString[i-1]!=' '){
            word=word++;
    }
        if(GivenString[i-1]=' '){
            if (word>longest){
                //longest stores the length of longer word
                longest=word;
                position2=i-1;
                position1=i-longest;
                word=0;
                }
            }
        }
        for (int j=position1; j<=position2; j++){
                Solution[p]=GivenString[j];
                p=p++;
        }
return (Solution[20]);
}

Answer 1

这应该有效:

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

void LongestWord(char string[100])
{
    char word[20],max[20],min[20],c;
    int i = 0, j = 0, flag = 0;
     for (i = 0; i < strlen(string); i++)
    {
        while (i < strlen(string) && string[i]!=32 && string[i]!=0)
        {
            word[j++] = string[i++];
        }
        if (j != 0)
        {
            word[j] = '\0';
            if (!flag)
            {
                flag = !flag;
                strcpy(max, word);
            }
            if (strlen(word) > strlen(max))
            {
                strcpy(max, word);
            }
            j = 0;
        }
    }
    printf("The largest word is '%s' .\n", max);

}


int main()
{
   char string[100];
    printf("Enter string: ");
    gets(string);
    LongestWord(string);
}