백준 9498 시험성적

 

#include <iostream>
 
int main()
{
    if (0 <= a && a <= 100)
    {
        if (90 <= a && a <= 100)
        {
            std::cout << "A\n";
        }
        else if (80 <= a && a <= 89)
        {
            std::cout << "B\n";
        }
        else if (70 <= a && a <= 79)
        {
            std::cout << "C\n";
        }
        else if (60 <= a && a <= 69)
        {
            std::cout << "D\n";
        }
        else
        {
            std::cout << "F\n";
        }
    }
    return 0;
}

#include <iostream>
 
int main()
{
    int a = 0;
    std::cin >> a;
    printf(a > 89 ? "A\n" : a > 79 ? "B\n" : a > 69 ? "C\n" : a > 59 ? "D\n" : "F");
    return 0;
}