题目链接题目描述Please create a function to extract the filename extension from the given path,return the extracted filename extension or null if none.#include<iostream>
#include<algorithm>
usi...
题目链接题目描述请设计一个算法能够完成两个用字符串存储的整数进行相加操作，对非法的输入则返回error#include<iostream>
#include<algorithm>
using namespace std;
bool judge_str(string str);
int main()
{
string s1,s2;
int len1,le...
题目链接题目描述将一句话的单词进行倒置，标点不倒置。比如 I like beijing. 经过函数后变为：beijing. like I#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;
const int maxn = 101;
//void rever...