467. [leetcode] Unique Substrings in Wraparound String
2024-10-19 06:29:36
问题描述
Implement atoi to convert a string to an integer.
Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases.
Notes: It is intended for this problem to be specified vaguely (ie, no given input specs). You are responsible to gather all the input requirements up front.
Update (2015-02-10):
The signature of the C++ function had been updated. If you still see your function signature accepts a const char * argument, please click the reload button to reset your code definition.
原题链接：https://leetcode.com/problems/string-to-integer-atoi/
Analysis
public int myAtoi(String str) {
if(str == null || str.length() == 0){
return 0;
}
char[] chs = str.trim().toCharArray();
int isPositive = 1, index = 0;
if(chs[0] == '-'){
isPositive = -1;
index = 1;
}
if(chs[0] == '+'){
isPositive = 1;
index = 1;
}
long res = 0;
for(; index < chs.length; index++){
if(chs[index] < '0' || chs[index] > '9' ){
return (int)res;
}
res = res * 10 + isPositive * (chs[index] - '0');
if(res > Integer.MAX_VALUE){
return Integer.MAX_VALUE;
}
if(res < Integer.MIN_VALUE){
return Integer.MIN_VALUE;
}
}
return (int)res;
}
最新文章
- 如何一步一步用DDD设计一个电商网站（四）—— 把商品卖给用户
- hadoop配置远程客户端
- django view使用学习记录
- jQuery遍历 slice()方法
- oracle expdp和impdp使用例子
- 如何用VB获得Windows各类系统目录
- Spring xml中进行面向切面的配置
- 毕向东udp学习笔记3多线程聊天
- SolrCloud的介绍
- 江西财经大学第二届程序设计竞赛同步赛 H大时钟 （扩展欧几里得）
- Java_泛型
- vue this.$router.push和this.$route.path的区别
- 宽字符————_T、_TEXT、L、TEXT之间的区别
- 『计算机视觉』Mask-RCNN
- ASP.NET Identity系列01，揭开神秘面纱
- vue---设置缩进为4个空格
- HTTPS 通俗简介
- 清除 Exchange 2013/2016/2019 日志和ETL文件
- Gulp 有用的地址
- linux sed使用（转）