Input a double array from commandline

input-double-array.cpp

/**
 * This is an example input a double number array from commandline
 * input: [ d1 d2 d3 ]
 * ouput: d1 d2 d3
 */

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

int main()
{
    std::string line;
    cout<<"Please input, using space as separator:"<<endl;
    std::getline(std::cin, line);  // read a line from std::cin into line
    const std::string input = line;

    // create an input string stream to read from the string
    std::istringstream stm(input) ;

    // perform formatted input from the string stream
    std::string str1, str2;
    double d1, d2, d3;

    // split string to some pattern(formatted), then print
    if( stm >> str1 >> d1 >> d2 >> d3 >> str2 )
    {
        std::cout << d1 << '\n' << d2 << '\n'
                  << d3 << '\n' ;
    }

    return 0;
}

input-double-string-array.cpp

/**
 * This is a general example to input a double number and strings array from commandline
 * input: str  d1  i1 d2 d3 i2
 */

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

int main()
{
    std::string line;
    cout<<"Please input:"<<endl;
    std::getline(std::cin, line);  // read a line from std::cin into line
    const std::string input = line;

    // create an input string stream to read from the string
    std::istringstream stm(input) ;

    // perform formatted input from the string stream
    std::string str ;
    double d1, d2, d3;
    int i1, i2;

    // split string to some pattern(formatted), then print
    if( stm >> str >> d1 >> i1 >> d2 >> d3 >> i2 )
    {
        std::cout << std::fixed << str << '\n' << d1 << '\n' << i1 << '\n'
                  << d2 << '\n' << d3 << '\n' << i2 << '\n' ;
    }
}