C++ Primer 04 Exercise

01

#include <iostream>

int main()
{
	using namespace std;
	cout << "이름을 입력해주세요 : ";
	char f_name[20];
	cin.getline(f_name, 20);
	cout << "성을 입력해주세요 : ";
	char l_name[20];
	cin.getline(l_name, 20);
	cout << "나이를 입력해주세요 : ";
	int age; 
	cin >> age;
	cout << "원하는 학점은 무엇입니까? : ";
	char grade;
	cin >> grade;

	cout << "영문 퍼스트 네임(이름) : " << f_name << endl;
	cout << "영문 라스트 네임(성) : " << l_name << endl;
	cout << "학생이 원하는 학점 : " << grade << endl;
	cout << "나이 : " << age
		 << "\n성명 : " << l_name << ", " << f_name
		 << "\n학점 : " << char (grade + 1)
		 << "\n나이 : " << age << endl;
	return 0;
}

02

#include <iostream>
#include <string>

int main()
{
	using namespace std;
	string f_name, l_name;
	cout << "이름을 입력해주세요 : ";
	getline(cin, f_name);
	cout << "성을 입력해주세요 : ";
	getline(cin, l_name);
	cout << "나이를 입력해주세요 : ";
	int age; 
	cin >> age;
	cout << "원하는 학점은 무엇입니까? : ";
	char grade;
	cin >> grade;

	cout << "영문 퍼스트 네임(이름) : " << f_name << endl;
	cout << "영문 라스트 네임(성) : " << l_name << endl;
	cout << "학생이 원하는 학점 : " << grade << endl;
	cout << "나이 : " << age
		 << "\n성명 : " << l_name << ", " << f_name
		 << "\n학점 : " << (char)(grade + 1)
		 << "\n나이 : " << age << endl;
	return 0;
}

03

#include <iostream>
#include <cstring>

int main()
{
	using namespace std;
	cout << "이름을 입력해주세요 : ";
	char f_name[20];
	cin.getline(f_name, 20);
	cout << "성을 입력해주세요 : ";
	char l_name[20];
	cin.getline(l_name, 20);
	char full_name[40];
	strcpy(full_name, l_name);
	strcat(full_name, ", ");
	strcat(full_name, f_name);


	cout << "하나의 문자열로 만들면 : " <<  full_name << endl;
	return 0;
}

04

#include <iostream>
#include <string>

int main()
{
	using namespace std;
	string f_name, l_name;
	cout << "이름을 입력해주세요 : ";
	getline(cin, f_name);
	cout << "성을 입력해주세요 : ";
	getline(cin, l_name);
	string full_name = l_name + ", " + f_name;

	cout << "하나의 문자열로 만들면 : " <<  full_name << endl;
	return 0;
}

05

#include <iostream>
struct CandyBar
{
	char name[20];
	double weight;
	int cal;
};

int main()
{
	using namespace std;
	CandyBar candy = {"Mocha Munch", 2.3, 350};

	cout << "name is " << candy.name << endl;
	cout << "weight is " << candy.weight << endl;
	cout << "calorie is " << candy.cal << endl;
	return 0;
}

06

#include <iostream>
struct CandyBar
{
	char name[20];
	double weight;
	int cal;
};

int main()
{
	using namespace std;
	CandyBar candy[3] = {
		{"Mocha Munch", 2.3, 350},
		{"B", 4.6, 700},
		{"C", 1.0, 100}
	};

	cout << "candy 1\n";
	cout << "name is " << candy[0].name << endl;
	cout << "weight is " << candy[0].weight << endl;
	cout << "calorie is " << candy[0].cal << endl;

	cout << "\ncandy 2\n";
	cout << "name is " << candy[1].name << endl;
	cout << "weight is " << candy[1].weight << endl;
	cout << "calorie is " << candy[1].cal << endl;

	cout << "\ncandy 3\n";
	cout << "name is " << candy[2].name << endl;
	cout << "weight is " << candy[2].weight << endl;
	cout << "calorie is " << candy[2].cal << endl;
	return 0;
}

07

#include <iostream>
struct pizza
{
	char name[20];
	double dia;
	double weight;
};

int main()
{
	using namespace std;
	pizza piz;

	cout << "피자 회사 이름을 입력하세요 : ";
	cin.getline(piz.name, 20);
	cout << "피자의 지름을 입력하세요 : ";
	cin >> piz.dia;
	cout << "피자의 중량을 입력하세요 : ";
	cin >> piz.weight;

	cout << "피자 회사의 이름은 " << piz.name << "입니다.\n"
		 << "피자의 지름은 " << piz.dia << "입니다.\n"
		 << "피자의 중량은 " << piz.weight << "입니다.\n";
	return 0;
}

08

#include <iostream>
struct pizza
{
	char name[20];
	double dia;
	double weight;
};

int main()
{
	using namespace std;
	pizza * piz = new pizza;

	cout << "피자 회사 이름을 입력하세요 : ";
	cin.getline(piz->name, 20);
	cout << "피자의 지름을 입력하세요 : ";
	cin >> piz->dia;
	cout << "피자의 중량을 입력하세요 : ";
	cin >> piz->weight;

	cout << "피자 회사의 이름은 " << piz->name << "입니다.\n"
		 << "피자의 지름은 " << piz->dia << "입니다.\n"
		 << "피자의 중량은 " << piz->weight << "입니다.\n";
	return 0;
}

09

```cpp
#include <iostream>
#include <cstring>
struct CandyBar
{
	char name[20];
	double weight;
	int cal;
};

int main()
{
	using namespace std;
	CandyBar * candy = new CandyBar[3];

	strcpy(candy[0].name, "A");
	candy[0].weight = 1.0;
	candy[0].cal = 11.1;
	
	strcpy(candy[1].name, "B");
	candy[1].weight = 2.0;
	candy[1].cal = 22.2;
	
	strcpy(candy[2].name, "C");
	candy[2].weight = 3.0;
	candy[2].cal = 33.3;

	cout << "candy 1\n";
	cout << "name is " << candy[0].name << endl;
	cout << "weight is " << candy[0].weight << endl;
	cout << "calorie is " << candy[0].cal << endl;

	cout << "\ncandy 2\n";
	cout << "name is " << candy[1].name << endl;
	cout << "weight is " << candy[1].weight << endl;
	cout << "calorie is " << candy[1].cal << endl;

	cout << "\ncandy 3\n";
	cout << "name is " << candy[2].name << endl;
	cout << "weight is " << candy[2].weight << endl;
	cout << "calorie is " << candy[2].cal << endl;
	return 0;
}

10

#include <iostream>
#include <array>

int main()
{
	using namespace std;
	array<double, 3> run;

	cout << "첫번째 달리기 결과를 입력하시오 : ";
	cin >> run[0];
	cout << "두번째 달리기 결과를 입력하시오 : ";
	cin >> run[1];
	cout << "세번째 달리기 결과를 입력하시오 : ";
	cin >> run[2];

	cout << "총 세번의 달리기의 평균은 " << (run[0] + run[1] + run[2]) / 3 << "입니다.\n";
	return 0;
}