C++中stringstream样例

string s;
stringstream ss;
int a, b, c;
getline(cin, s);
ss.clear();
ss.str(s);
ss >> a >> b >> c; //这里默认空格直接会分词，而且即使abc的类型不同还是可以的，相当于灵活类型转换

string s;
stringstream ss;
int n, i, sum, a;
cin >> n;
getline(cin, s); // 读取换行符
for (i=0; i<n; i++)
{
    getline(cin, s);
    ss.clear();
    ss.str(s);
    sum=0;
    while (1)
    {
        ss >> a;
        if ( ss.fail() ) break; //fail()判断是否到底
        sum+=a;
    }
    cout << sum << endl;
}

    //stringstream用于split很方便  
    string a, b, c, d;  
    string lines="adfa;asdfasd;fasdf;ccc";   
    stringstream line(lines);  //可以直接初始化
    getline(line, a, ‘f‘);  
    getline(line, b, ‘;‘);  
    getline(line, c, ‘;‘);  
    getline(line, d);     //与不同的getline搭配
    cout<<"a = "<<a<<endl;  
    cout<<"b = "<<b<<endl;  
    cout<<"c = "<<c<<endl;  
    cout<<"d = "<<d<<endl;