#C++PrimerPlus# Chapter12_Exersice7_sayings2
续上题,用指向对象的指针改写Example6。
程序清单如下:
// sayings2.cpp
#include <iostream>
#include <cstdlib>
#include <ctime>
#include "string1.h"
const int ArSize = 10;
const int MaxLen = 81;
int main()
{
using namespace std;
String name;
cout << "Hi, what's your name?\n";
cin >> name;
cout << name << ", please enter up to " << ArSize
<< " short sayings <empty line to quit>:\n";
String sayings[ArSize];
char temp[MaxLen];
int i;
for (i = 0; i < ArSize; i++)
{
cout << i+1 << ": ";
cin.get(temp, MaxLen);
while (cin && cin.get() != '\n')
continue;
if (!cin || temp[0] == '\0')
break;
else
sayings[i] = temp;
}
int total = i;
if (total > 0)
{
cout << "Here are your sayings:\n";
for (i = 0; i < total; i++)
cout << sayings[i] << "\n";
String* shortest = &sayings[0];
String* first = &sayings[0];
for (i = 1; i < total; i++)
{
if (sayings[i].length() < shortest->length())
shortest = &sayings[i];
if (sayings[i] < *first)
first = &sayings[i];
}
cout << "Shortest saying:\n" << *shortest << endl;
cout << "First alphabetically:\n" << *first << endl;
srand(time(0));
int choice = rand() % total;
String* favorite = new String(sayings[choice]);
cout << "My favorite saying:\n" << *favorite << endl;
delete favorite;
}
else
cout << "Not much to say, eh?\n";
cout << "Bye.\n";
system("pause>nul");
return 0;
}
结束。