parse string to vector of int

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The most elegant way to iterate the words of a string [closed] 74 answers

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You can use std::stringstream . You will need to #include <sstream> apart from other includes.

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

std::string myString = "10 15 20 23";
std::stringstream iss( myString );

int number;
std::vector<int> myNumbers;
while ( iss >> number )
  myNumbers.push_back( number );

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std::string myString = "10 15 20 23";
std::istringstream is( myString );
std::vector<int> myNumbers( std::istream_iterator<int>( is ), std::istream_iterator<int>() );

或者，如果矢量已经被定义，则代替最后一行

myNumbers.assign( std::istream_iterator<int>( is ), std::istream_iterator<int>() );

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这几乎是现在其他答案的重复。

#include <iostream>
#include <vector>
#include <iterator>
#include <sstream>

int main(int argc, char* argv[]) {
    std::string s = "1 2 3 4 5";
    std::istringstream iss(s);
    std::vector<int> v{std::istream_iterator<int>(iss),
                       std::istream_iterator<int>()};
    std::copy(v.begin(), v.end(), std::ostream_iterator<int>(std::cout, " "));
}

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