C++学习笔记(6)

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#include<fstream>

int main(){
//                    |filename      |mode
    std::ofstream os("file.txt", std::ios::app);
    os << "hello world!";//输入hello world！到os

    //buffer
    os.flush();
    os.close();

    std::ifstream is("file2.txt");

    string str;
    getline(is, str); //从is中读取一行到str
    cout << str << endl;

    is.close();
}

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#include<string>
#include<sstream>
using std::cout;
using std::endl;
using std::string;

int main(){
    string raw_string = "dsf dsf h trjhytjyt jkuyke dffh";
    std::stringstream ss(raw_string);
    int count = 0;
    string word;
    while(ss >> word){
        count ++;
        cout << word << endl;
    }
    cout << count << endl;

}