/* C++ Primer 3.2.4 習題 3.7
 * 題目: 編寫程序實現從標準輸入讀入兩個 string 對象，比較其是否相等，哪個較大，哪個較長。
 */
 
#include <iostream>
#include <string>
 
using std::cin;
using std::cout;
using std::string;
using std::endl;
 
int main()
{
	string s1, s2;
	getline(cin, s1);
	getline(cin, s2);
	if (s1 == s2)
		cout << "S1, S2 is the same." << endl;
	else if (s1 > s2)
		cout << "S1 is biger than S2." << endl;
	else
		cout << "S2 is biger than S1." << endl;
	if (s1.length() == s2.length())
		cout << "S1, S2 is the same length." << endl;
	else if (s1.length() > s2.length())
		cout << "S1 is longer than S2." << endl;
	else
		cout << "S2 is longer than S1." << endl;
	return 0;
}

/* C++ Primer 3.2.2 習題 3.5
 * 題目: 編寫程序實現從標準輸入每次讀入一行文本。
 */
 
#include <iostream>
#include <string>
 
using std::cin;
using std::cout;
using std::string;
 
int main()
{
	string s;
	while (getline(cin, s))
	{
		cout << s;
	}
	return 0;
}

/* C++ Primer 3.2.2 習題 3.5
 * 題目: 編寫程序實現從標準輸入每次讀入一個單詞。
 */
 
#include <iostream>
#include <string>
 
using std::cin;
using std::cout;
using std::string;
 
int main()
{
	string s;
	while (cin >> s)
	{
		cout << s;
	}
	return 0;
}