当数据包含空格时，如何将制表符分隔文件的内容加载到C ++中的字符串的二维向量中？

Question

I have the following code to load the content of a tab separated file into a 2D vector of strings. Problem is that this is code fails if there is any space in the data. How can I modify the code to take that into account.

const std::size_t columns = 4;
std::string word;
std::size_t count = 0;
std::ifstream in("some_file");
std::vector<std::vector<std::string>> data;
std::vector<std::string> row;
while(in >> word) {
    row.push_back(std::move(word));
    if(++count % columns == 0) {
        data.push_back(std::move(row));
        row.clear();
    }
}

Answer 1

Use std::getline to get the entire line, then split the line into separate strings based on a tab delimiter. Something like this:

#include <sstream>

std::string line;
std::vector<std::vector<std::string>> data;

while(std::getline(in, line)) {
    std::string phrase;
    std::vector<std::string> row;
    std::stringstream ss(line);
    while(std::getline(ss, phrase, '\t')) {
        row.push_back(std::move(phrase));
    }
    data.push_back(std::move(row));
}