using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleEx
{
class array7
{
public static void Main(string[] args)
{
string data = "가나다라가나다라가나다라가나다라";
int index = -1;
int startIndex = 0;
while (true)
{
index = data.IndexOf("닷넷", startIndex);
if (index > -1)
{
Console.WriteLine(index);
startIndex = index + 2;
}
else
break;
}
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleEx
{
class quiz2_20_2
{
public static void Main(string[] args)
{
Console.WriteLine("앞, 뒤 , 가운데에 공백이 들어간 문자열을 입력하세요.");
Console.Write("입력 : ");
string input = Console.ReadLine();
int i, j, k = 0;
for (i = 0; ;)
if (input.IndexOf(" ", i) == i) i++;
else break;
for (j = input.Length - 1; ; j--)
if (input.LastIndexOf(" ", j) == j) k++;
else break;
Console.WriteLine("입력한 문자열 : [{0}]", input);
input = input.Replace(" ", "");
Console.Write("가운데 공백 제거 후 : [");
for (; i > 0; i--)
Console.Write(" ");
Console.Write("{0}", input);
for (; k > 0; k--)
Console.Write(" ");
Console.WriteLine("]");
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace String
{
class string_03
{
public static void Main(string[] args)
{
string jumin = "841219-2456547";
jumin = jumin.Replace("-", "");
Console.WriteLine(jumin);
int sum = 0;
for (int i = 0; i < 12; i++)
{
//Console.WriteLine("{0} X {1}", jumin.Substring(i, 1), i);
//Console.WriteLine("{0} X {1}, {2}", jumin[i].ToString(), (i % 8) + 2, i);
sum += int.Parse(jumin.Substring(i, 1)) * ((i % 8) + 2);
}
int temp = sum % 11;
temp = 11 - temp;
temp = temp % 10;
if (temp.ToString() == jumin.Substring(12, 1))
Console.WriteLine("올바른..");
else
Console.WriteLine("올바르지 않은");
}
}
}
using System;
namespace ConsoleEx
{
class quiz2_20_3
{
public static void Main(string[] args)
{
string input;
Console.WriteLine("주민등록번호 유효성 검사하기");
int jmc = 1;
while (jmc == 1)
{
Console.Write("주민등록번호 입력 : ");
input = Console.ReadLine();
string yoon = "평년";
input = input.Replace("-", "");
while (true)
if (input.Length == 13) break;
else
{
Console.Write("재입력 : ");
input = Console.ReadLine();
input = input.Replace("-", "");
}
int year = 0, month = 0, day = 0, maxDay = 0;
switch (int.Parse(input.Substring(6, 1)))
{
case 1:
case 2:
case 5:
case 6: year += 1900; break;
case 3:
case 4:
case 7:
case 8: year += 2000; break;
default: year += 1800; break;
}
year += int.Parse(input.Substring(0, 1)) * 10 + int.Parse(input.Substring(1, 1));
month += int.Parse(input.Substring(2, 1)) * 10 + int.Parse(input.Substring(3, 1));
day += int.Parse(input.Substring(4, 1)) * 10 + int.Parse(input.Substring(5, 1));
if ((year % 4 == 0 && year % 100 == 0 && year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)) yoon = "윤년";
switch (month)
{
case 2:
if (yoon == "윤년") maxDay = 29;
else maxDay = 28; break;
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: maxDay = 31; break;
default: maxDay = 30; break;
}
if ((month > 0 && month <= 12) && (day > 0 && day <= maxDay)) jmc = Check(input);
if (jmc == 1) Console.WriteLine("올바르지 않는 주민등록번호 입니다.");
}
Console.WriteLine("올바른 주민등록번호 입니다.");
}
public static int Check(string jm)
{
int i = 0, sum = 0, j = 2;
for (; i <= jm.Length - 2; i++)
{
sum += int.Parse(jm.Substring(i, 1)) * j++;
if (j == 10) j = 2;
}
if (int.Parse(jm.Substring(12, 1)) == 11 - sum % 11) return 2;
else return 1;
}
}
}
