simple structure – adding set methods – class definition recap 7/9

Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 15 Class Definition Drill 7

[code language=”cpp”]
// Philipp Siedler
// Bjarne Stroustrup’s PP
// Chapter 15 Class Definition Drill 7

#include "std_lib_facilities.h"

struct Person
{
Person(string name, int age);
Person() {}

const string name() { return n; }
const int age() { return a; }

void set_name(string name);
void set_age(int age);

private:
string n;
int a;
};

Person::Person(string name, int age)
{
for (char l : name) {
if (!isalpha(l)) { error("name contains invalid character: ", name); }
}
if (age > 150 || age < 0) { error("age is not valid", age); }

n = name;
a = age;
}

void Person::set_name(string name)
{
for (char l : name) {
if (!isalpha(l)) { error("name contains invalid character: ", name); }
}
n = name;
}

void Person::set_age(int age)
{
if (age > 150 || age < 0) { error("age is not valid", age); }
a = age;
}

istream& operator>>(istream& is, Person& p) {
string name;
int age;

is >> name >> age;

p.set_name(name);
p.set_age(age);

return is;
}

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

int main()
try
{
Person p1;
cin >> p1;
cout << p1 << endl;

keep_window_open();
}
catch (exception& e) {
cerr << "error: " << e.what() << ‘\n’;
keep_window_open();
return 1;
}

catch (…) {
cerr << "Unknown exception!\n";
keep_window_open();
return 2;
}
[/code]

Input:
Input:
Goofy 63

Output:
Name: Goofy Age: 63
Please enter a character to exit