[BOJ/Step1] 입출력과 사칙연산 (C++)

www.acmicpc.net/problem/2557  : Hello World

#include <iostream>
using namespace std;

int main(void){
    cout << "Hello World!" << endl;
}

 

www.acmicpc.net/problem/10718  : We love kriii

#include <iostream>
using namespace std;

int main(void){
    cout << "강한친구 대한육군" << endl;
    cout << "강한친구 대한육군" << endl;
}

www.acmicpc.net/problem/10171  : 고양이

#include <iostream>
using namespace std;

int main(void){
    cout << "\\    /\\" << endl;
    cout << " )  ( ')" << endl;
    cout << "(  /  )" << endl;
    cout << " \\(__)|" << endl;
}

www.acmicpc.net/problem/10172  : 개

#include <iostream>
using namespace std;

int main(void){
    cout << "|\\_/|" << endl;
    cout << "|q p|   /}" << endl;
    cout << "( 0 )\"\"\"\\" << endl;
    cout << "|\"^\"`    |" << endl;
    cout << "||_/=\\\\__|" << endl;
}

www.acmicpc.net/problem/1000  : A + B

#include <iostream>
using namespace std;

int main(void){
    int a, b;
    cin >> a >> b;
    cout << a + b << endl;
}

www.acmicpc.net/problem/1001  : A - B

#include <iostream>
using namespace std;

int main(void){
    int a, b;
    cin >> a >> b;
    cout << a - b << endl;
}

 

www.acmicpc.net/problem/10998  : A X B

#include <iostream>
using namespace std;

int main(void){
    int a, b;
    cin >> a >> b;
    cout << a * b << endl;
}

 

www.acmicpc.net/problem/1008  : A / B

#include <iostream>
using namespace std;

int main(void){
    long double a, b;
    cin >> a >> b;
    cout.precision(9);
    cout << fixed;
    cout << a / b << endl;
}

www.acmicpc.net/problem/10869  : 사칙연산

#include <iostream>
using namespace std;

int main(void){
    long double a, b;
    cin >> a >> b;
    cout << a + b << endl << a - b << endl << a * b << endl;
    cout << int(a / b) << endl;
    cout << int(a) % int(b) << endl;
}

www.acmicpc.net/problem/10430  : 나머지

#include <iostream>
using namespace std;

int main(void){
    int a, b, c;
    cin >> a >> b >> c;
    cout << (a + b) % c << endl << ((a % c) + (b % c)) % c << endl;
    cout << (a * b) % c << endl << ((a % c) * (b % c)) % c << endl;
}

www.acmicpc.net/problem/2588  : 곱셈

#include <iostream>
using namespace std;

int main(void){
    int a, b;
    cin >> a >> b;
    cout << a * (b % 10) << endl;
    cout << a * ((b % 100) / 10) << endl;
    cout << a * (b / 100) << endl;
    cout << a * b << endl;   
}