Chapter15_drill_PPPC++

c15_drill_class.cpp

#include "../../std_lib_facilities.h"

struct Person{
    Person(string first_name, string second_name, int age);
    Person(string name, int age);

    string first_name() const { return first_n; }
    string second_name() const { return second_n; }
    string name() const;
    int age() const { return a; }
private:
    string first_n;
    string second_n;
    int a;
};

string Person::name() const
{
    string result = "";
    if(0 < first_n.length()){
        result += first_n;
    }
    if(0 < second_n.length()){
        if(0 < first_n.length()){
            result += ' ';
        }
        result += second_n;
    }
    return result;
}

bool isValidAge(int age)
{
    bool result = false;
    if((age < 0 || 150 < age) == false){
        result = true;
    }
    return result;
}

vector<char> get_error_name()
{
    vector<char> tb;
    tb.push_back('"');
    tb.push_back('\'');
    tb.push_back('[');
    tb.push_back(']');
    tb.push_back('*');
    tb.push_back('&');
    tb.push_back('^');
    tb.push_back('%');
    tb.push_back('$');
    tb.push_back('#');
    tb.push_back('@');
    tb.push_back('!');
    return tb;
}

bool isValidName(string name)
{
    bool result = false;

    // 名無しを通す
    if(name.length() == 0){
        result = true;
        return result;
    }

    vector<char> error_name = get_error_name();

    for(int i = 0; i < name.length(); ++i){
        for(int j = 0; j < error_name.size(); ++j){
            if(name[i] != error_name[j]){
                result = true;
            } else {
                result = false;
                break;
            }
        }
        if(result == false){
            break;
        }
    }
    return result;
}

Person::Person(string first_name, string second_name, int age)
{
    if(isValidAge(age)){
        a = age;
    } else {
        error("age error");
    }

    if(first_name.length() + second_name.length() == 0){
        error("name error");
    } else {
        if(isValidName(first_name)){
            first_n = first_name;
        } else {
            error("first_name error");
        }
    
        if(isValidName(second_name)){
            second_n = second_name;
        } else {
            error("second_name error");
        }
    }
}

Person::Person(string name, int age)
{
    if(isValidAge(age)){
        a = age;
    } else {
        error("age error");
    }

    if(name.length() != 0 || isValidName(name)){
        first_n = name;
    } else {
        error("name error");
    }
}

istream& operator>>(istream& is, Person& p)
{
    char ch1, ch2;
    string f_n;
    string s_n;
    int age;

    cout << "first_name: ";
    is >> f_n;
    if(!is){
        return is;
    }

    cout << "second_name: ";
    is >> s_n;
    if(!is){
        return is;
    }

    cout << "age: ";
    is >> age;
    if(!is){
        return is;
    }
    
    // first_nameとsecond_nameの片方さえあればokにしたいんだけど
    // そもそも「入力しないことを許す」方法がよくワカラン・・・

    if(f_n.length() + s_n.length() == 0){
        error("name error");
    } else {
        if(f_n.length() == 0){
            Person temp("", s_n, age);
            p = temp;
        } else if (s_n.length() == 0) {
            Person temp(f_n, "", age);
            p = temp;
        } else {
            Person temp(f_n, s_n, age);
            p = temp;
        }
    }
    return is;
}

ostream& operator<<(ostream& os, const Person& p)
{
    return os << p.name() << " : " << p.age();
}

int main(){
    Person p("Goofy", 63);
    cout << p << endl;

    Person p2(" ", 0);
    cin >> p2;
    cout << p2 << endl;

    vector<Person> persons;
    Person temp(" ", 0);
    while(cin >> temp){
        persons.push_back(temp);
    }
    for(int i = 0; i < persons.size(); ++i){
        cout << persons[i] << endl;
    }

    keep_window_open();
}