[백준] 단계별로 풀어보기 > 입출력과 사칙연산(c++)

문제 1. Hello World

#include <iostream>

int main(){
    std::cout << "Hello World!";
    
    return 0;
}

 

문제 2. We love krill

#include <iostream>

int main(){
    std::cout << "강한친구 대한육군";
    std::cout << "강한친구 대한육군";
    
    return 0;
}

 

문제 3. 고양이

#include <iostream>

using namespace std;

int main() {
    cout << "\\    /\\\n";
    cout << " )  ( ')\n";
    cout << "(  /  )\n";
    cout << " \\(__)|\n";
    
    return 0;
}

 

문제 4. 개

#include <iostream>
using namespace std;

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

 

문제 5. A+B

int main(){
    int a, b;
    
    scanf("%d %d", &a, &b);
    printf("%d", a+b);
    
    return 0;
}

 

문제 6. A-B

int main(){
    int a, b;
    
    scanf("%d %d", &a, &b);
    printf("%d", a-b);
    
    return 0;
}

 

문제 7. A*B

#include <iostream>

int main(){
    int A, B;
    
    std::cin >> A >> B;
    std::cout << A * B;
    
    return 0;
}

 

문제 8. A/B

#include <iostream>

using namespace std;

int main() {
    double a, b;
    cin >> a >> b;
    
    printf("%.10f", a / b);

    return 0;
}

 

문제 9. 사칙연산

#include <iostream>

using namespace std;

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

    return 0;
}

 

문제 10. 나머지

#include <iostream>

using namespace std;

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

    return 0;
}

 

문제 11. 곱셈

#include <iostream>

using namespace std;

int main() {
    int a, b, c;
    int b1, b2, b3;

    cin >> a;
    cin >> b;

    c = a * b;
    b3 = a * (b / 100);
    b %= 100;
    b2 = a * (b / 10);
    b %= 10;
    b1 = a * b; 

    cout << b1 << endl;
    cout << b2 << endl;
    cout << b3 << endl;
    cout << c << endl;

    return 0;
}

 

결과