大家好，我创建了一个程序，允许我创建、删除、更新、列出和检索三个数组的用户输入现在我的更新功能出现问题，我无法获得打印正确文本的功能而不是说它Update Player: Player [player number] has a point total of [number of points] points 说Update Player: Player System.int32[] has a point total of System.int32[] points
有谁知道如何让它工作我在想我需要将它存储到一个新变量中，并且只需将新变量用于更新函数，但每次我尝试它时都会得到相同的结果，因为新变量和旧的是一样的，当旧的改变时，新的也会效仿
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace FinalArrays
{
class Program
{
static void Main(string[] args)
{
//The MAXPLAYERS constant is the physical table size
const Int32 MAXPLAYERS = 23;
//Declare the player tables
Int32[] playerNumbers = new Int32[MAXPLAYERS];
String[] playerLastNames = new String[MAXPLAYERS];
Int32[] playerPoints = new Int32[MAXPLAYERS];
//Keep track of the actual number of players (i.e. logical table size)
Int32 playerCount = 0;
//Main Driver
char menuItem;
Console.WriteLine("Welcome to the player system...\n");
menuItem = GetMenuItem();
while (menuItem != 'X')
{
ProcessMenuItem(menuItem, playerNumbers, playerLastNames, playerPoints, ref playerCount, MAXPLAYERS);
menuItem = GetMenuItem();
}
Console.WriteLine("\nThank you, goodbye");
Console.ReadLine();
}
//Returns either a 'C', 'R', 'U', 'D', 'L', or 'X' to the caller
static char GetMenuItem()
{
char menuItem;
DisplayMenu();
menuItem = char.ToUpper(char.Parse(Console.ReadLine()));
while (menuItem != 'C' && menuItem != 'R'
&& menuItem != 'L' && menuItem != 'X' && menuItem != 'U' && menuItem !='D')
{
Console.WriteLine("\nError - Invalid menu item");
DisplayMenu();
menuItem = char.ToUpper(char.Parse(Console.ReadLine()));
}
return menuItem;
}
static void DisplayMenu()
{
Console.WriteLine("\nPlease pick an item:");
Console.WriteLine("C - Create Player");
Console.WriteLine("R - Retrieve Player");
Console.WriteLine("U - Update Player");
Console.WriteLine("D - Delete Player");
Console.WriteLine("L - List Players");
Console.WriteLine("X - Exit");
}
//Routes to the appropriate process routine based on the user menu choice
static void ProcessMenuItem(Char menuItem, Int32[] playerNumbers, String[] playerLastNames,
Int32[] playerPoints, ref Int32 playerCount, Int32 MAXPLAYERS)
{
switch (menuItem)
{
case 'C':
ProcessCreate(playerNumbers, playerLastNames, playerPoints, ref playerCount, MAXPLAYERS);
break;
case 'L':
ProcessList(playerNumbers, playerLastNames, playerPoints, playerCount);
break;
case 'R':
ProcessRetrieve(playerNumbers, playerLastNames, playerPoints, ref playerCount, MAXPLAYERS);
break;
case 'U':
ProcessUpdate(playerNumbers,playerLastNames,playerPoints, playerCount,MAXPLAYERS);
break;
case 'D':
ProcessDelete(playerNumbers, playerLastNames, playerPoints, playerCount, ref playerCount,MAXPLAYERS);
break;
}
}
//Creates a player in the tables if the array is not already full and the name is not a duplicate
static void ProcessCreate(Int32[] playerNumbers, String[] playerLastNames,
Int32[] playerPoints, ref Int32 playerCount, Int32 MAXPLAYERS)
{
Int32 number, points;
String lastName;
if (playerCount < MAXPLAYERS)
{
number = GetPositiveInteger("\nCreate Player: please enter the player's number");
if (GetPlayerIndex(number, playerNumbers, playerCount) == -1)
{
lastName = GetString("\nCreate Player: please enter the player's last name");
points = GetPositiveInteger("\nCreate Player: please enter the player's points");
InsertPlayer(number, lastName, points, playerNumbers, playerLastNames, playerPoints, ref playerCount);
Console.WriteLine("\nCreate Player: Number - {0}, Name - {1}, Points - {2}, created successfully", number, lastName, points);
Console.WriteLine();
}
else
Console.WriteLine("\nCreate Player: the player number already exists");
}
else
Console.WriteLine("\nCreate Player: the player roster is already full");
}
//Inserts the player at the correct location in the tables based on order of
//ascending player number. Unless the insert location is at the end, this
//requires shifting existing players down in order to make room
static void InsertPlayer(Int32 number, String lastName, Int32 points,
Int32[] playerNumbers, String[] playerLastNames, Int32[] playerPoints,
ref Int32 playerCount)
{
/* PUTS DATA IN NEXT AVALIABLE SLOT
playerNumbers[playerCount] = number;
playerLastNames[playerCount] = lastName;
playerPoints[playerCount] = points;
playerCount++;
*/
// PUTS DATA IN PLAYER ASECENDING ORDER
Int32 insertIndex, shiftCount;
insertIndex = GetInsertIndex(number, playerNumbers, playerCount);
for (shiftCount = playerCount; shiftCount > insertIndex; shiftCount--)
{
playerNumbers[shiftCount] = playerNumbers[shiftCount - 1];
playerLastNames[shiftCount] = playerLastNames[shiftCount - 1];
playerPoints[shiftCount] = playerPoints[shiftCount - 1];
}
playerNumbers[insertIndex] = number;
playerLastNames[insertIndex] = lastName;
playerPoints[insertIndex] = points;
playerCount++;
}
//Returns the index of the first player number in the table that is greater
//than the player number to be inserted
static Int32 GetInsertIndex(Int32 playerNumber, Int32[] playerNumbers,
Int32 playerCount)
{
Int32 index = 0;
bool found = false;
while (index < playerCount && found == false)
if (playerNumbers[index] > playerNumber)
found = true;
else
index++;
return index;
}
//Returns the index of the player number in the table
//or -1 if the number is not found
static Int32 GetPlayerIndex(Int32 playerNumber,
Int32[] playerNumbers, Int32 playerCount)
{
Int32 index = 0;
bool found = false;
while (index < playerCount && found == false)
if (playerNumbers[index] == playerNumber)
found = true;
else
index++;
if (found == false)
index = -1;
return index;
}
//Lists the players in the tables
static void ProcessList(Int32[] playerNumbers, String[] playerLastNames,
Int32[] playerPoints, Int32 playerCount)
{
if (playerCount > 0)
{
Console.WriteLine("\n{0,7} {1,-25}{2,6}\n", "Number", "Last Name", "Points");
for (Int32 player = 0; player < playerCount; player++)
if (playerLastNames[player].ToString().Length != 0)
{
Console.WriteLine("{0,7} {1,-25}{2,6}", playerNumbers[player], playerLastNames[player], playerPoints[player]);
}
}
else
Console.WriteLine("\nList Players: the roster is empty");
}
//Returns a positive integer
static Int32 GetPositiveInteger(String prompt)
{
Int32 n;
Console.WriteLine(prompt);
n = Int32.Parse(Console.ReadLine());
while (n < 0)
{
Console.WriteLine("\nError: enter positive value");
Console.WriteLine(prompt);
n = Int32.Parse(Console.ReadLine());
}
return n;
}
//Returns a non-empty string
static String GetString(String prompt)
{
String returnString;
Console.WriteLine(prompt);
returnString = Console.ReadLine();
while (returnString == "")
{
Console.WriteLine("\nError: must enter keyboard data");
Console.WriteLine(prompt);
returnString = Console.ReadLine();
}
return returnString;
}
// retrieve single value from an array
static void ProcessRetrieve(Int32[] playerNumbers, String[] playerLastNames,
Int32[] playerPoints, ref Int32 playerCount, Int32 MAXPLAYERS)
{
int player;// Player number to find
int playerindex;//index of the player number in Array
if (playerCount < MAXPLAYERS)
{
player = GetPositiveInteger("\nRetrieve Player: please enter the player's number");
playerindex = GetPlayerIndex(player, playerNumbers, playerCount);
if (playerindex != -1)
{
// if (playerLastNames[playerindex].ToString().Length!= 0)
{
//Console.WriteLine("{0,7}{1,-25}{2,6}", playerNumbers[playerindex], playerLastNames[playerindex], playerPoints[playerindex]);
Console.WriteLine("\nRetrive Player: Number - {0}, Name - {1}, Points - {2}", playerNumbers[playerindex], playerLastNames[playerindex], playerPoints[playerindex]);
Console.WriteLine();
}
}
else
Console.WriteLine("\nRetrieve Player: player not found");
}
else
Console.WriteLine("\nRetrieve Player: the roster is empty");
}
这是我遇到问题的更新功能
static void ProcessUpdate(Int32[] playerNumbers,
string[] playerLastnames, Int32[] playerpoints, Int32 playerCounts, Int32 MAXPLAYERS)
{
int player;// Player number to find
int playerindex;//index of the player number in Array
int points;
if (playerCounts < MAXPLAYERS || playerCounts == MAXPLAYERS)
{
player = GetPositiveInteger("\nUpdate Player: please enter the player's number");
playerindex = GetPlayerIndex(player, playerNumbers, playerCounts);
if (playerindex != -1)
{
Console.WriteLine("\nUpdate Player: Player {0} has a point total of {1} points",playerNumbers,playerpoints);
points = GetPositiveInteger("\nUpdate Player: please enter player's new point total");
Console.WriteLine("\nUpdate Player: Number - {0}, Name - {1}, Points - {2}, successfully updated", playerNumbers[playerindex], playerLastnames[playerindex], playerpoints[playerindex]);
playerpoints[playerindex] = points;
}
else
Console.WriteLine("\nUpdate Player: player not found");
}
else
Console.WriteLine("\nUpdate Player: the roster is empty");
}
static void ProcessDelete(Int32[] playerNumbers, string[] playerLastnames, Int32[] playerpoints, Int32 playerCounts, ref Int32 playerCount, Int32 MAXPLAYERS)
{
int player;// Player number to find
int playerindex;//index of the player number in Array
String lastName;
int points;
if (playerCounts < MAXPLAYERS || playerCounts == MAXPLAYERS)
{
player = GetPositiveInteger("\nDelete Player: please enter the player's number");
playerindex = GetPlayerIndex(player, playerNumbers, playerCounts);
if (playerindex != -1)
{
Console.WriteLine("The player entry was sucessfully deleted");
Console.WriteLine("\nDelete Player: Number - {0}, Name - {1}, Points - {2}, deleted successfully", playerNumbers[playerindex], playerLastnames[playerindex], playerpoints[playerindex]);
lastName = "";
points = 0;
playerNumbers[playerindex] = 0;
playerLastnames[playerindex] = lastName;
playerpoints[playerindex] = points;
}
else
Console.WriteLine("\nDelete Player: player not found");
}
else
Console.WriteLine("\nDelete Player: the roster is empty");
}
}
}