[꿈씨방개] 내 꿈은 씨쁠쁠 방산 개발자 - 2 (기본 문법 中 부족한 부분 채우기)

 

 

 

 

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#include <iostream>
#include <numeric>
// #include <namespace>

using namespace std;

int main()
{
    std::cout<<"Hello World" << std::endl;
    
    int x = 1, y(4);
    
    std::cout << x << "\n" << y << std::endl;
    
    // int num0 = 1;
    // int num1 = num0 * 1.5;
    // int num2 = num0 / 2;
    // int num3 = num2*3;
    
    int num0 = 11;   // 10진수
    int num1 = 011;  // 8진수
    int num2 = 0b11; // 2진수
    int num3 = 0x11; // 16진수
    
    std::cout << num0 << std::endl;    
    std::cout << num1 << std::endl;   
    std::cout << num2 << std::endl;   
    std::cout << num3 << std::endl;   
    
    // signed   부호가 있는
    // unsigned 부호가 없는
    // short : 2 byte
    // int   : 4 byte
    
    int intNum = 0;
    long longNum = 0;
    
    int* intPointer = &intNum;
    long* longPointer = &longNum;
    
    cout << sizeof(intNum) << endl;
    cout << sizeof(longNum) << endl;
    cout << sizeof(intPointer) << endl;
    cout << endl;
    
    // Overflow Example
    
    uint32_t num32 = numeric_limits<uint32_t>::max();
    uint32_t num32_ = num32 + 1;
    
    cout << num32 << endl;
    cout << num32_ << endl;
    
    int32_t inum32 = numeric_limits<int32_t>::min();
    int32_t inum32_ = inum32 - 1;
    
    cout << inum32 << endl;
    cout << inum32_ << endl;
    
    // Switch
    
    char selection;
    cout << "Who's the best player in the position? (FW, MF, DF, GK) : " << endl;
    cin >> selection;
    
    switch (selection) 
    {
        case 'F':
        case 'f':
            cout << "11. Kim In-Gyun" << endl; break;
        case 'M':
        case 'm':
            cout << "73. Lee Jun-Gyu" << endl; break;
        case 'D':
        case 'd':
            cout << "33.Lee Jeong-Taek" << endl; break;
        case 'G':
        case 'g':
            cout << "1. Lee Chang-Geun" << endl; break;
        default:
            cout << endl;
    }
    
    // int num4;
    // cin >> num4;
    // do {
    //     if (num4%3==0)
    //         break;
    //     if (num4%5==0)
    //         break;
    //     cout << "통과" << endl;
    // } while (false);
    
    // cout << "끝" << endl;
    
    int num5;
    cin >> num5;
    
    do {
        if (num5%3==0)
            cout << "이것은 do-while문, 3로 나눠집니다." << endl;
            break;
        if (num5%5==0)
            cout << "이것은 do-while문, 5로 나눠집니다." << endl;
            break;
        cout << "3 또는 5로 나눠지지 않습니다." << endl;
    } while (false);

    return 0;
}