OK、これはユーザーにバスケットボール選手の入力を促すプログラムです。ユーザーがプレーヤーの名前の入力を求められた後、入力を検証して、それが実際に文字列であることを確認します。まあ、検証は常に true に関係なく実行され、プログラムが終了します。これは、他の入力検証では発生せず、文字列だけです。なぜそれが常に真に実行され、プログラムが終了するのかについてのアイデアはありますか? ありがとうございました。
これが私のコードです：
#include <iostream>
#include <string>
#include <iomanip>
#include <cstdlib>
using namespace std;
//struct of Basketball Player info
struct BasketballPlayerInfo
{
string name; //player name
int playerNum, //player number
pointsScored; //points scored
};
int main()
{
int index, //loop count
total = 0; //hold total points
const int numPlayers = 5; //nuymber of players
BasketballPlayerInfo players[numPlayers]; //Array of players
//ask user for Basketball Player Info
cout << "Enter the name, number, and points scored for each of the 5 players.\n";
for (index = 0; index < numPlayers; index++)
{
//collect player name
cout << " " << endl;
cout << "Enter the name of player # " << (index + 1);
cout << ": ";
//input validation
if((!(getline(cin, players[index].name)))); <----validation goes wrong!
{
cout << "Player Name must be alphabetical characters only!\n";
cout << "Program terminating please start over." << endl;
system("pause");
exit(0);
}
getline(cin, players[index].name);
//collect players number
cout << "Enter the number of player # " << (index + 1);
cout << ": ";
//input validation
if(!(cin >> players[index].playerNum))
{
cout << "Player Name must be numeric characters only!\n";
cout << "Program terminating please start over." << endl;
system("pause");
exit(0);
}
//collect points scored
cout << "Enter points scored for player # " << (index + 1);
cout << ": ";
//input validation
if(!(cin >> players[index].pointsScored))
{
cout << "Player Name must be numeric characters only!\n";
cout << "Program terminating please start over." << endl;
system("pause");
exit(0);
}
cin.ignore();
}
//display
cout << "\n";
cout << "Here is the information for each player: \n";
cout << fixed << showpoint << setprecision(2) << setw(5);
cout << "\n";
cout << " \tName\tNumber\tPoints\n";
cout << "------------------------------------------------" << endl;
for(index = 0; index < numPlayers; index++)
{
cout << "Player # " << (index + 1);
cout << ": \t" << players[index].name << "\t" << players[index].playerNum << "\t" << players[index].pointsScored << endl;
cout << "------------------------------------------------" << endl;
}
//display total points scored by all players
for(index = 0; index < numPlayers; index++)
{
//hold total
total += players[index].pointsScored;
}
cout << "Total Points scored are: " << total << endl;
system("pause");
return 0;
}