f0306.cpp string流，getline整行读入，分解读入

//====================//f0306.cpp//string流，getline整行读入，分解读入//====================#include<iostream>#include<string> #include<sstream>#include<fstream>using namespace std;//====================int main () { ifstream in("a.txt");for(string s;getline(in,s);){int a , sum = 0;for(istringstream sin(s); sin >> a; sum += a);cout << sum <<endl;} return 0; } //====================