题目：

题解：

int lengthOfLongestSubstring(char * s)
{//类似于hash的思想//滑动窗口维护int left = 0;int right = 0;int max = 0;int i,j;int len = strlen(s);int haveSameChar = 0;for(i =0; i < len ; i++  ){if(left <= right){   //检测是否出现重复//循环遍历整个数组 left -> righthaveSameChar = 0;for(j = left; j < right ; j++){if(s[j] == s[right]){haveSameChar = 1;break;}}if(haveSameChar){//指向下一个left = j +1;}}//统计最大的间距max = max < (right - left + 1) ? (right - left + 1): max;right++;}return max;
}