C语言打印最长字符串

编程在一个已知的字符串中找最长单词，假定字符串中只含字母和空格，空格用来分隔不同单词。

 char p[];
     printf("请输入字符串:");

    fgets(p, , stdin);
     int i = ;

     int high = ;
     int low = ;
     int low_temp = ;
     int high_temp = ;
     int count = ;
     int temp = ;
     for (i = ; i < strlen(p); i++) {
         temp = ;
         low_temp = i;
         while (p[i] != ' ' && p[i] != '\0') {
            temp++;
             i++;
         }
         high_temp = i-;
         if (temp > count ) {
             count = temp;
             low = low_temp;
             high = high_temp;
         }

     }
     for (int i = low; i <= high; i++) {
         printf("%c",p[i]);
     }
     printf("\n");