翻转字符串

1.  i am a student《=》tneduts a ma i  两边对称

void flipString(char*arr,int lowIndex，int len) {
    if(len<2){
       return;
    }
    int highIndex = len-1;while (lowIndex < highIndex) {
        char tmp = arr[highIndex];//数组内容进行翻转
        arr[lowIndex] = arr[lowIndex];
        arr[right] = tmp;
        highIndex--;
        lowIndex++;
    }
}

 2.  i am a student =>student a am i

第一步直接调用flipString，实现 i am a student =》tneduts a ma i=》student a am i

第二步实现单词的翻转。

reverseWord(char* arr, int len){

    int index = 0
    int wordLen = 0;
    flipString(arr,0,len);
    while(arr[index] !=''){
        
        if(arr[index]==' '){
　　　　　　　int indexStart = index-wordLen;
            flipString(&arr[indexStart],indexStart,wordLen);
            wordLen = 0;
        }else{
            wordLen++;
        }
        index++;

    }

}