[memo] C++ 矩陣與字串差異

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

int main()
{
    
    char charr[20];
    string str;

    cout << "Length of string in charr before input: "
         << strlen(charr) << endl;
    cout <<  "Length of string in str before input: "
         << str.size() << endl;
    cout << "Enter a line of text: \n" ;
    
    cin.getline(charr,20);

    cout <<  "You entered: " << charr << endl;
    cout << "Enter another line of text: " << endl;

    getline(cin,str);

    cout << "You entered: " << str << endl;
    //cout << "Length of string in charr after input: " << sizeof(charr) << endl;
    //sizeof() 秀出的是矩陣的大小
    cout << "Length of string in charr after input: " << strlen(charr) << endl;
    cout << "Length of string in str after input: " << str.size() << endl;




    system("pause");
    return 0;
}