11718번,11719번,11720번

11718번

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
	string str;
	while (1)
	{
		getline(cin, str);
		if (str == "\0")
		{
			break;
		}
		else
		{
			cout << str << endl;
		}
	}
	
	
}

11719번

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
	int i = 1;
	string str;
	while (i<=100)
	{
		getline(cin, str);		
		cout << str << endl;
		i++;
	}
	
	
}

 

11720번

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
	int n = 0;
	cin >> n;
	char a;
	int sum = 0;
	for (int i = 0; i < n; i++)
	{
		cin >> a;
		sum = sum + (a - 48);
	}
	cout << sum;
}

 

공백입출력 string,char

#include<iostream>
#include<string>
using namespace std;
int main(void)
{
	string a;
	getline(cin, a);
	cout << a << endl;

	char b[100];
	cin.getline(b, 100);
	cout << b;

}