Xâu và chuỗi

#include <iostream>

#include <string>

using namespace std;

string s = "Hello";

string t;

 cin >> s; 

 Hello 

 getline(cin, s); 

 Xin chao cac ban 

 cout << s; 

string a = "Xin ";

string b = "chao";

cout << a + b;

 Xin chao 

 a += b; 

 cout << s.length(); 

 cout << s.size(); 

string s = "Python";

cout << s.length();

 6 

 cout << s[0]; cout << s[1]; 

 string s = "Hello"; 

 H e 

for (int i = 0; i < s.length(); i++)

{

    cout << s[i] << endl;

}

for (char c : s)

{

    cout << c << endl;

}

if (a == b)

    cout << "Giong nhau";

else

    cout << "Khac nhau";

string s = "LapTrinh";

cout << s.substr(3, 5);

 Trinh 

 
 
string s = "Hello World"; cout << s.find("World");
 

 6 

 string::npos 

 
 
string s = "Hello"; s.erase(1, 2); cout << s;
 

 Hlo 

 
 
string s = "Hlo"; s.insert(1, "el"); cout << s;
 

 Hello 

#include <iostream>

#include <string>

using namespace std;

int main()

{

    string s;

    getline(cin, s);

    cout << "Do dai: " << s.length() << endl;

    for (char c : s)

    {

        cout << c << endl;

    }

    return 0;

}