一、Hello World

#include<iostream>
using namespace std;
int main(){
    cout << "hello" <<endl;
    return 0;
}

編譯

g++ helloworld.cpp -o helloworld

執行

./helloworld

二、字符串

• 字符串拼接
• 字符串打印

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

int main(){

    string name = "fzj";
    string school = "zju";
    cout << name + "\n" + school << endl;
    return 0;

}

三、輸入輸出

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

int main(){

    string s;
    cin >> s;
    cout << s <<endl;
    return 0;

}

四、集合

• 創建集合
• 打印集合

#include<iostream>
#include<vector>
using namespace std;

int main(){

    vector<int> v1;
    int word;
    while(cin >> word){
        v1.push_back(word);
    }

    for(vector<int>::size_type ix = 0;ix != v1.size();++ix){
        cout << v1[ix] << endl;
    }

}

輸入EOF，終止輸入

五、函數

• 函數調用
• 函數重載

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

string getString(string str){
    return str;
}

string getString(string str,string str2){
    return str + str2;
}

int main(){

    string name = "fzj";
    cout << getString(name) << endl;
    cout << getString(name,"/nzju") << endl;
    return 0;

}