宽字符测试

C++字符串操作与比较

最新推荐文章于 2021-02-16 13:48:25 发布

原创最新推荐文章于 2021-02-16 13:48:25 发布 · 967 阅读

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本文详细探讨了C++中字符串的基本操作，包括字符串长度、大小比较、字符查找及子字符串提取，并展示了如何使用字符串流进行输出。

#include<iostream>
#include<string>
using namespace std;

int main()
{
wstring ws1=L"一二三四五六七八九";
wstring ws2=L"123456789";
wstring ws3=L"abcdefghi";
string a="";
cout<<sizeof(a)<<" "<<sizeof(ws1)<<endl;
cout<<"ws1："<<ws1.length()<<" "<<sizeof(ws1)<<" "<<ws1.size()<<endl;
cout<<"ws2："<<ws2.length()<<" "<<sizeof(ws2)<<" "<<ws1.size()<<endl;
cout<<"ws3："<<ws3.length()<<" "<<sizeof(ws3)<<" "<<ws1.size()<<endl;
cout<<sizeof(wchar_t)<<endl;
string str="一二三四五六七八九";
size_t found=str.find("五");
cout<<found<<endl;
size_t found2=str.find("六");
cout<<str.capacity()<<endl;
cout<<ws2.capacity()<<endl;
cout<<str.substr(found,found2-found)<<endl;
}