노력과 삽질 퇴적물

#include <iostream>
#include <conio.h>

using namespace std;

int val = 13;

int main()
{
	int val = 5;

	cout << "지역변수   val == " << val << endl;
	cout << "전역변수 ::val == " << ::val << endl;
	cout << "\n";
	getch();

	return 0;
}

#include <iostream>
#include <conio.h>

using namespace std;

void function();
int    function(int number);
float function(float number);



int main()
{
	float in = 0;
	int type_size = 0;
	int result_i = 0;
	float result_f = 0;

	cout << "정수나 실수를 입력하시오: ";
	cin >> in;
	type_size = sizeof(in);

	if ( in != (int) in ) //float인지 체크
	{
		result_f = function(in);
		cout << "\t(float) 2 * " << in << " == " << result_f << endl;
	}
	else if ( in == (int) in) //int인지 체크
	{
		result_i = function(in);
		cout << "\t(int) 2 * " << in << " == " << result_i << endl;
	}
	else
	{
		function();
	}
	getch();



	return 0;
}

#include <iostream>
#include <conio.h>

using namespace std;
template <typename datatype>
//template <class class_t>//클래스에도 사용가능?

datatype sum(datatype a, datatype b)
{
	return (a + b);
} // 자료형과 표현하는 방식이 달라도 기본적인 처리법이 같을때 유용.



int main()
{
	int    a_i, b_i, c_i;
	float a_f, b_f, c_f;

	cout << "정수1 입력: ";
	cin >> a_i ;
	cout << "정수2 입력: ";
	cin >>  b_i;
	cout << "실수1 입력: ";
	cin >> a_f;
	cout << "실수2 입력: ";
	cin >>  b_f;

	c_i = sum(a_i, b_i);
	c_f = sum(a_f, b_f);

	cout << "\t정수 : " << c_i << endl;
	cout << "\t실수 : " << c_f << endl;
	getch();



	return 0;
}

#include <iostream>
#include <iomanip>
using namespace std;

int main()
{
	int set_n = 21;
	int arr[2][2] = {{20, 11}, {7, 10}};
	int i;
	int j;
	int n;


	for (i= 0, n =0; i<2; i++)
	{
		for (j= 0; j<2; j++, n++)
		{
			cout << " arr[" << i+1 << "]" << "[" << j+1 << "] == 내용물 " << arr[i][j] << endl;

			cout << "주소값"  << setw(set_n) << "&arr[i][j] == "

                                                          << &arr[i][j] << endl;
			cout << "주소값"  << setw(set_n) << "arr[i] + j == "

                                                          << arr[i] + j << endl;

			cout << "주소값"  << setw(set_n) << "*arr + n == "

                                                          << *arr + n << endl;

			cout << "참조값"  << setw(set_n) << "*(arr[i] + j) == " << *(arr[i] + j) << endl;
			cout << "참조값"  << setw(set_n) << "*(*arr + n) == " << *(*arr + n) << endl;
			cout << "참조값"  << setw(set_n) << "*(*(arr + i) + j) == "

                                                  << *(*(arr + i) + j) << endl;
			cout << "참조값"  << setw(set_n) << "(*(arr + i))[j] == "

                                                          << (*(arr + i))[j] << endl;
			cout << "\n";
		}
	}



	return 0;
}

클래스의 경우 아래처럼(?)
class SampleClass
{
    public:
        ... ... ...
};

    SampleClass *sample[2];

    sample[0] = new Sample;

    sample[1] = new Sample;

...