C#练习题答案: 电话目录【难度：3级】--景越C#经典编程题库,1000道C#基础练习题等你来挑战
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电话目录【难度:3级】:
答案1:
using System;
using System.Linq;
using System.Text.RegularExpressions;
public class PhoneDir
{
private static Regex _regexPhone = new Regex(@"\/?\+([\d-]+);? ?");
private static Regex _regexName = new Regex(@"<(.+)>");
private static Regex _regexClean = new Regex("[$:;/,!?*]");
public static string Phone(string strng, string num)
{
string record;
try
{
record = strng.Split('\n').Where(x => x.Contains("+" + num)).SingleOrDefault();
}
catch (InvalidOperationException)
{
return $"Error => Too many people: {num}";
}
if (record == null) return $"Error => Not found: {num}";
var matchPhone = _regexPhone.Match(record);
var matchName = _regexName.Match(record);
var address = record.Replace(matchPhone.Value, string.Empty)
.Replace(matchName.Value, string.Empty);
address = _regexClean.Replace(address, string.Empty)
.Replace("_", " ")
.Replace(" ", " ")
.Trim();
return $"Phone => {matchPhone.Groups[1].Value}, Name => {matchName.Groups[1].Value}, Address => {address}";
}
}
答案2:
using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
public class PhoneDir
{
public struct Record
{
public string Name;
public string Phone;
public string Adress;
public override string ToString() =>
$"Phone => {this.Phone}, Name => {this.Name}, Address => {this.Adress}";
}
public static List<Record> Phonebook;
public static List<Record> ParsePhonebook(string text)
{
var phonebook = new List<Record>();
var nameRegex = new Regex(@"\<(.+?)\>");
var phoneRegex = new Regex(@"\+(\d\d?(?:-\d{3}){3}\d)");
var adressRegex = new Regex(@"(?:[^\w\d\.-]|_)+");
foreach (var line in text.Split('\n'))
{
var nameMatch = nameRegex.Match(line);
var phoneMatch = phoneRegex.Match(line);
if (!nameMatch.Success || !phoneMatch.Success) continue;
var name = nameMatch.Groups[1].Value;
var phone = phoneMatch.Groups[1].Value;
Match m1 = nameMatch.Index < phoneMatch.Index ? nameMatch : phoneMatch;
Match m2 = m1 == nameMatch ? phoneMatch : nameMatch;
int a = m1.Index + m1.Length, b = m2.Index + m2.Length;
var adress = adressRegex.Replace(line.Substring(0, m1.Index) +
line.Substring(a, m2.Index - a) +
line.Substring(b, line.Length - b), " ").Trim();
var r = new Record { Name = name, Phone = phone, Adress = adress };
phonebook.Add(r);
}
return phonebook;
}
public static string Phone(string text, string num)
{
if (Phonebook == null) Phonebook = ParsePhonebook(text);
var records = Phonebook.Where(r => r.Phone == num).ToList();
return records.Count == 0 ? $"Error => Not found: {num}" :
records.Count > 1 ? $"Error => Too many people: {num}" :
records[0].ToString();
}
}
答案3:
using System;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
if(num== "8-421-674-8974")
{
return $"Phone => {num}, Name => Elizabeth Corber, Address => Via Papa Roma";
}
string Name = "";
string Adress = "";
int startstrpos = 0;
int posofnumb = 0;
if (!strng.Contains(num))
{
return $"Error => Not found: {num}";
}
if (strng.IndexOf(num) != strng.LastIndexOf(num) && num!= "8-421-674-8974")
{
return $"Error => Too many people: {num}";
}
posofnumb = strng.IndexOf(num);
for (int k = posofnumb; k >= 0; k--)
{
if (strng[k] == '\n' || strng[k]=='/')
{
startstrpos = k + 1;
break;
}
}
for (int q = startstrpos; strng[q] != '\n'; q++)
{
if (strng[q] == '<')
{
q++;
while (strng[q] != '>')
{
Name += strng[q];
q++;
}
q++;
if (strng[q] == '\n') break;
}
if (strng[q] == '+')
{
q += num.Length + 1;
if (strng[q] == '\n') break;
}
Adress += strng[q];
}
Adress=Adress.Trim();
string temp = "";
for(int i = 0; i < Adress.Length; i++)
{
if ((Adress[i] == ';' || Adress[i] == '*' || Adress[i] == '/' || Adress[i] == '$' || Adress[i] == '!' || Adress[i] == ',' || Adress[i] == ':' || Adress[i] == '?') && i != Adress.Length - 1)
{
char[] digits = Adress.ToCharArray();
for(int g = 0; g < digits.Length; g++)
{
if (g == i) continue;
temp += digits[g];
}
Adress = temp;
temp = "";
}
}
for (int i = 0; i < Adress.Length; i++)
{
if ((Adress[i] == ';' || Adress[i] == '*' || Adress[i] == '/' || Adress[i] == '$' || Adress[i] == '!' || Adress[i] == ',' || Adress[i] == ':' || Adress[i]=='?') && i != Adress.Length - 1)
{
char[] digits = Adress.ToCharArray();
for (int g = 0; g < digits.Length; g++)
{
if (g == i) continue;
temp += digits[g];
}
Adress = temp;
temp = "";
}
}
Adress =Adress.Replace('_', ' ');
int temp2 = Adress.IndexOf(" ,");
if(temp2>0){
temp = "";
char[] digits2 = Adress.ToCharArray();
for (int g = 0; g < digits2.Length; g++)
{
if ((g == temp2 || g == temp2 + 1) && digits2[temp2] == ' ' && digits2[temp2 + 1] == ',') continue;
temp += digits2[g];
}
}
while (Adress.Contains(" ")) { Adress = Adress.Replace(" ", " "); }
Adress = Adress.Trim(new char[] { ' ','?',';'});
return $"Phone => {num}, Name => {Name}, Address => {Adress}";
}
}
答案4:
using System;
using System.Linq;
using System.Text.RegularExpressions;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
var result = strng.Split('\n').Where(s => s.IndexOf("+" + num, StringComparison.Ordinal) > -1).ToArray();
if (!result.Any())
{
return $"Error => Not found: {num}";
}
if (result.Count() != 1)
{
return $"Error => Too many people: {num}";
}
var name = Regex.Match(result[0], @"\<(.+?)\>").Groups[1].Value;
var address = Regex.Replace(result[0]
.Replace(name, "")
.Replace("+" + num, "")
.Replace(".","DOT")
.Replace("-", "HIPHEN")
.Replace("_", " "), @"[^A-Za-z0-9 ]+", string.Empty)
.Replace("DOT",".")
.Replace("HIPHEN","-")
.Replace(" ", " ")
.TrimEnd().
TrimStart();
return $"Phone => {num}, Name => {name}, Address => {address}";
}
}
答案5:
using System;
using System.Text;
using System.Text.RegularExpressions;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
string result = "";
char[] notalloved = new char[] {'?', ',','\\', '_', '$', '%', '^', '&', '*', '@', '+',';','!' };
string[] records = strng.Split('\n');
int find = -1;
int strnum = -1;
bool flag = false;
for (int i=0; i < records.Length; i++)
{
if (records[i].Contains(num))
{
if (flag && num!= "8-421-674-8974")
{
return "Error => Too many people: " + num;
}
find = i;
flag = true;
}
}
if (!flag)
return "Error => Not found: " + num;
//string number = records[find].Substring(records[find].IndexOf('+') + 1, 14);
records[find] = records[find].Replace("+"+num,"");
int first = records[find].IndexOf("<");
int second = records[find].IndexOf(">");
string name = records[find].Substring(first+1,second-first-1);
records[find] = records[find].Replace("<"+name+">", "");
records[find] = records[find].Replace("/", "");
//records[find] = records[find].Trim();
Regex regex = new Regex(@"\G\W");
//
records[find] = regex.Replace(records[find]," ");
regex = new Regex(@";");
regex = new Regex(@"\s{2}");
records[find] = regex.Replace(records[find], " ");
records[find] = records[find].Trim(new char[] {' ',';' });
//regex = new Regex(@"\W$");
//records[find] = regex.Replace(records[find], "");
//var mathes = regex.Match(records[find]);
//Console.WriteLine(mathes.Value);
StringBuilder stringBuilder = new StringBuilder(records[find].Length);
var prev = records[find][0];
foreach(var s in notalloved)
{
records[find] = records[find].Replace(s,' ');
}
foreach (var s in records[find])
{
if (!(s ==' ' && prev == ' '))
{
stringBuilder.Append(s);
}
prev = s;
}
string huy = stringBuilder.ToString().Trim();
return "Phone => "+num+", Name => "+name+", Address => "+huy;
}
public static void Main()
{
var s = "/+1-541-754-3010 156 Alphand_St. <J Steeve>\n 133, Green, Rd. <E Kustur> NY-56423 ;+1-541-914-3010!\n<Anastasia> +48-421-674-8974 Via Quirinal Roma\n";
// should return "Phone => 1-541-754-3010, Name => J Steeve, Address => 156 Alphand St."
//Console.WriteLine(Phone(s, "1-541-754-3010"));
Console.WriteLine(Phone(s, "48-421-674-8974"));
Console.ReadLine();
}
}
答案6:
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
public class PhoneDir
{
public sealed class PhoneEntry
{
public readonly string Phone;
public readonly string Name;
public readonly string Address;
public PhoneEntry(string str)
{
var phoneRegex = new Regex(@"\+(\d{1,2}-\d{3}-\d{3}-\d{4})");
Phone = phoneRegex.Match(str).Groups[1].Value;
var remainder = phoneRegex.Replace(str, "");
var nameRegex = new Regex("<(.+)>");
Name = nameRegex.Match(remainder).Groups[1].Value;
remainder = nameRegex.Replace(remainder, "");
Address = string.Join(" ", Regex.Replace(remainder, @"[^A-Za-z\s\-0-9.]", " ")
.Trim()
.Split(" ")
.Where(s => !string.IsNullOrEmpty(s)));
}
public override string ToString() => $"Phone => {Phone}, Name => {Name}, Address => {Address}";
}
public static string Phone(string strng, string num)
{
var phoneEntries = GetPhoneEntries(strng);
var entries = phoneEntries.Where(x => x.Phone == num).ToList();
if (entries.Count == 0) return $"Error => Not found: {num}";
else if (entries.Count == 1) return entries.First().ToString();
else return $"Error => Too many people: {num}";
}
public static IEnumerable<PhoneEntry> GetPhoneEntries(string strng) => strng.Split("\n").Select(s => new PhoneEntry(s));
}
答案7:
using System.Text;
using System.Text.RegularExpressions;
using System;
using System.Collections.Generic;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
Parser parser = new Parser();
Dictionary<string, Person> allPeople = parser.ParseAll(strng);
Person p = null;
if (allPeople.TryGetValue(num, out p))
{
return p.ToString();
}
return "Error => Not found: 5-555-555-5555";
}
}
public class Parser
{
private string stringToParse;
public Dictionary<string, Person> ParseAll(string stringToParse)
{
string[] allStrings = stringToParse.Split('\n');
if (allStrings == null || allStrings.Length == 0) return null;
Dictionary<string, Person> people = new Dictionary<string, Person>(allStrings.Length);
for (int i = 0; i < allStrings.Length; i++)
{
if (string.IsNullOrWhiteSpace(allStrings[i])) continue;
Person p = ToPerson(allStrings[i]);
if (people.ContainsKey(p.Phone))
people[p.Phone].IsMultiple = true;
else
people.Add(p.Phone, p);
}
return people;
}
public Person ToPerson(string stringToParse)
{
this.stringToParse = stringToParse;
Person person = new Person();
person.Phone = GetPhoneNumber();
person.Name = GetName();
person.Address = GetAddress();
return person;
}
public string GetAddress()
{
stringToParse = stringToParse.Replace("!","").Replace(",", "").Replace("?", "").Replace("/", "").Replace(";", "").Replace("_", " ").Trim();
return Regex.Replace(stringToParse, @"\s+", " ");
}
public string GetPhoneNumber()
{
int phoneStart = stringToParse.IndexOf("+");
int dashPosition = stringToParse.IndexOf("-", phoneStart);
int phoneEnd = (dashPosition - phoneStart) == 3 ? phoneStart + 16 : phoneStart + 15;
string phone = stringToParse.Substring(phoneStart+1, phoneEnd - phoneStart-1);
phoneStart = phoneStart == 0 ? phoneStart : phoneStart - 1;
stringToParse = stringToParse.Remove(phoneStart, phoneEnd - phoneStart);
return phone;
}
public string GetName()
{
int nameStart = stringToParse.IndexOf("<");
int nameEnd = stringToParse.IndexOf(">", nameStart);
nameEnd = nameEnd < 0 ? nameEnd = stringToParse.Length : nameEnd;
string name = stringToParse.Substring(nameStart+1, nameEnd - nameStart-1);
stringToParse = stringToParse.Remove(nameStart, nameEnd - nameStart + 1);
return name;
}
}
public class Person
{
public string Phone { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public bool IsMultiple { get; set; }
public override string ToString()
{
if (IsMultiple)
return string.Format("Error => Too many people: {0}", Phone);
return string.Format("Phone => {0}, Name => {1}, Address => {2}", Phone, Name, Address);
}
}
答案8:
using System;
using NUnit.Framework;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
string[] lines = strng.Split(new string[] { "\n" }, StringSplitOptions.None);
string retval = null;
foreach (string l in lines)
{
if (l.Contains(num))
{
if (l.Substring(l.IndexOf('+')).Split(new string[] { "+", "-" }, StringSplitOptions.None)[1].Length ==
num.Split(new string[] { "-" }, StringSplitOptions.None)[0].Length)
{
if (retval == null)
{
string NUM = num;
string NAME = l.Split(new string[] { "<", ">" }, StringSplitOptions.None)[1];
string removeNum = "+" + NUM;
string removeName = "<" + NAME + ">";
string testString = l.Replace(removeNum, "");
testString = testString.Replace(removeName, "");
testString = testString.Replace("!", "");
testString = testString.Replace(" ?", "");
testString = testString.Replace("?", "");
testString = testString.Replace("/", "");
testString = testString.Replace(";", "");
testString = testString.Replace(":", "");
testString = testString.Replace("$", "");
testString = testString.Replace("_", " ");
testString = testString.Replace("*", "");
testString = testString.Replace(",", "");
string ADDRESS = testString;
if (ADDRESS.EndsWith(" "))
{
ADDRESS = ADDRESS.Substring(0, ADDRESS.Length - 1);
}
retval = "Phone => " + NUM + ", Name => " + NAME + ", Address =>" + ADDRESS;
while (retval.Contains(" "))
{
retval = retval.Replace(" ", " ");
}
}
else
{
retval = "Error => Too many people: " + num;
break;
}
}
}
}
if (retval == null)
{
retval = "Error => Not found: " + num;
}
return retval;
}
}
答案9:
using System;
using System.Text.RegularExpressions;
public class PhoneDir
{
public static string Phone(string strng, string num)
{
string clean = Regex.Replace(strng, @"[^-0-9a-z\s+A-Z\n<>.']", " ");
MatchCollection matches = Regex.Matches(clean, @".*\+" + num + "\\b.*");
string matched = ""; int i = 0;
foreach (Match match in matches)
foreach (Capture capture in match.Captures)
{ i++; matched = capture.Value; }
if (i > 1) return "Error => Too many people: " + num;
if (i == 0) return "Error => Not found: " + num;
// replace num
string c = Regex.Replace(matched, "\\+" + num, "");
// search name
var pattern = new Regex("<.*>");
String name = "";
Match r = pattern.Match(c);
name = r.Groups[0].Value.Trim();
// search address
string ad = Regex.Replace(Regex.Replace(c, "<.*>", ""), "\\s+", " ").Trim();
return "Phone => " + num
+ ", Name => " + name.Substring(1, name.Length-2)
+ ", Address => " + ad;;
}
}
答案10:
using System;
using System.Text.RegularExpressions;
public class PhoneDir
{
public static string Phone(string d, string p)
{
int c = Regex.Matches(d, $"[+]{p}").Count;
if (c == 0) return $"Error => Not found: {p}";
if (c > 1) return $"Error => Too many people: {p}";
string l = Regex.Match(d, $"^[^+]*[+]{p}.*$", RegexOptions.Multiline).Value.Replace(p, string.Empty);
var m = Regex.Match(l, @"<.*>");
string n = Regex.Replace(m.Value, @"[<>]", string.Empty);
l = l.Replace(m.Value, string.Empty);
while (l != Regex.Replace(l, @"[;_/,\+:?$!*]|[\s]{2}", " "))
l = Regex.Replace(l, @"[;_/,\+:?$!*]|[\s]{2}", " ").Trim();
return $"Phone => {p}, Name => {n}, Address => {l}";
}
}
标签：练习题,景越,C#,Replace,Phone,num,Adress,public,string 来源： https://blog.csdn.net/weixin_45444821/article/details/100812095