/*const char sentence[] = "our Tomorrow will be better";
    printf("%s\n",sentence);
    int maxWordLength = 0,currentWordLength = 0,maxWordStartIndex = 0;
    unsigned long str_len = strlen(sentence);
    for (int i = 0; i < str_len + 1; i++) {
        char character = sentence[i];
        if (character != ' ' && character != '\0') {
            currentWordLength ++ ;
        }else{
            if(maxWordLength < currentWordLength){
                maxWordLength = currentWordLength;
                maxWordStartIndex = i - currentWordLength;
            }
            currentWordLength = 0;
        }
    }
    printf("startIndex = %d; maxLength = %d ",maxWordStartIndex,maxWordLength);
    for (int i = maxWordStartIndex; i < maxWordLength + maxWordStartIndex; i++) {
        printf("%c",sentence[i]);
    }*/
不明白“int maxWordLength = 0,currentWordLength = 0,maxWordStartIndex = 0;”的意义，请大神能讲解一下