Bjarne Stroustrup “Programming Principles and Practice Using C++”
Chapter 8 Exercise 7
Using std_lib_facilities.h by Bjarne Stroustrup.
main.cpp main file
[code language=”cpp”]
//Philipp Siedler
//Bjarne Stroustrup’s PP
//Chapter 8 Exercise 7
#include "std_lib_facilities.h"
vector<string> names;
vector<int> ages;
class NameAge {
vector<string> n;
vector<int> a;
public:
NameAge(vector<string>& _n, vector<int>& _a) :n(_n), a(_a) {};
void readNames();
void readAges();
void print();
void sortVectors();
};
void NameAge::readNames() {
while (cin) {
char letter;
cin.get(letter);
if (isalpha(letter)) {
string name;
name += letter;
while (cin.get(letter) && isalpha(letter)) {
name += letter;
}
n.push_back(name);
}
if (isspace(letter)) {
if (letter == ‘\n’) {
break;
}
}
}
}
void NameAge::readAges() {
while (n.size() != a.size()) {
char ageChar;
int ageInt;
cin.get(ageChar);
if (isspace(ageChar)) {
if (ageChar == ‘\n’ && n.size() == a.size()) {
break;
}
}
cin.unget();
cin >> ageInt;
a.push_back(ageInt);
}
}
void NameAge::print() {
for (int i = 0; i < n.size(); i++) {
cout << n[i] << " " << a[i] << "\n";
}
}
void NameAge::sortVectors() {
vector<string> tempNames = n;
vector<int> tempAges = a;
vector<int> index;
sort(tempNames.begin(), tempNames.end());
for (int i = 0; i < n.size(); i++) {
for (int j = 0; j < n.size(); j++) {
if (tempNames[i] == n[j]) {
index.push_back(j);
}
}
}
for (int i = 0; i < n.size(); i++) {
a[i] = tempAges[index[i]];
}
n = tempNames;
}
int main()
try
{
NameAge na(names, ages);
cout << "Enter name(s)\n";
na.readNames();
cout << "Promt ages in order of names:\n";
na.readAges();
na.sortVectors();
na.print();
keep_window_open();
}
catch (runtime_error e) {
cout << e.what() << "\n";
keep_window_open();
}
catch (…) {
cout << "Exiting\n";
keep_window_open();
}
[/code]
Output: Enter name(s) Philipp Alfred Isabell Benjamin Promt ages in order of names: 28 60 31 23 Alfred 60 Benjamin 23 Isabell 31 Philipp 28 Please enter a character to exit
