#include <iostream>

enum CPU_RANK { P1 = 1, P2, P3, P4, P5, P6, P7 };

class CPU {
private:
    CPU_RANK rank;
    int frequency;
    float voltage;

public:
    void enter() {
        int rankInt;
        std::cout << "Rank(1-7): ";
        std::cin >> rankInt;
        rank = (enum CPU_RANK)rankInt;

        std::cout << "Frequency: ";
        std::cin >> frequency;

        std::cout << "Voltage: ";
        std::cin >> voltage;
    };

    void display() {
        std::cout << "Rank: " << rank << "; Frequency: " << frequency
                  << "MHz; Voltage: " << voltage << "V." << std::endl;
    };
};

int main() {
    CPU a_cpu;
    a_cpu.enter();
    a_cpu.display();
    return 0;
}