解析逗号分隔的 std::string [英] Parsing a comma-delimited std::string

问题描述

如果我有一个包含以逗号分隔的数字列表的 std::string，解析数字并将它们放入整数数组的最简单方法是什么?

If I have a std::string containing a comma-separated list of numbers, what's the simplest way to parse out the numbers and put them in an integer array?

我不想将其概括为解析其他任何内容.只是一个简单的逗号分隔的整数字符串，例如1,1,1,1,2,1,1,1,0".

I don't want to generalise this out into parsing anything else. Just a simple string of comma separated integer numbers such as "1,1,1,1,2,1,1,1,0".

推荐答案

一次输入一个数字，检查后面的字符是否为,.如果是这样，丢弃它.

Input one number at a time, and check whether the following character is ,. If so, discard it.

#include <vector>
#include <string>
#include <sstream>
#include <iostream>

int main()
{
    std::string str = "1,2,3,4,5,6";
    std::vector<int> vect;

    std::stringstream ss(str);

    for (int i; ss >> i;) {
        vect.push_back(i);    
        if (ss.peek() == ',')
            ss.ignore();
    }

    for (std::size_t i = 0; i < vect.size(); i++)
        std::cout << vect[i] << std::endl;
}

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