C++使用std::string_view分割字符串

原文

实现与测试

#include <vector>
#include <string_view>
#include <iostream>
using namespace std;
std::vector<std::string_view> Split(std::string_view sv, char ch)
{
    
    
    std::vector<std::string_view> points;
    size_t point = 0;
    for (size_t i = 0; i < sv.length(); i++)
    {
    
    
        if (sv[i] == ch)
        {
    
    
            points.emplace_back(std::string_view(&sv[point], i - point));
            point = i + 1;
        }
    }
   	if (point >= sv.size())
	{
    
    
		points.emplace_back(std::string_view(&sv[point - 1], sv.size() - point));
	}
	else {
    
    
		points.emplace_back(std::string_view(&sv[point], sv.size() - point));
	}
    return points;
}
int main()
{
    
    
    string t = "-111,222-,333-444,-";
    for (auto &&i : Split(t, ','))
    {
    
    
        for (auto &&j : Split(i, '-'))
        {
    
    
            std::cout << atoi(string(j).c_str()) << std::endl;
        }
    }

    return 0;
}

运行结果