lst-0034-book.cpp
// https://godbolt.org/z/1EMox3hW5
#include <sstream> // istringstream
#include <iostream>
int main() {
std::istringstream istr;
std::string sval("3.1415 : 4321");
std::string none;
double dval=0.0;
int ival=0;
istr.str(sval); // initialize
istr >> dval >> none >> ival; // read
if( ! istr.eof() ) {
std::cout << "Error converting\n"; return 1;
}
std::cout << dval << " == " << none << " == " << ival << "\n";
// Output: 3.1415 == : == 4321
}