Created
September 23, 2013 17:10
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욕먹을 사이퍼 코드
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import java.util.Scanner; | |
public class Cipher { | |
private static char key[] = { | |
0x21, 0x40, 0x23, 0x24, 0x25, 0x5e, 0x26, 0x2a, 0x28, 0x29, 0x5f, 0x2d, | |
0x2b, 0x3d, 0x7c, 0x5c, 0x60, 0x7e, 0x7d, 0x7b, 0x5b, 0x5d, 0x27, 0x22, | |
0x3b, 0x3a, 0x3e, 0x3c, 0x3f, 0x2f, 0x71, 0x77, 0x65, 0x72, 0x74, 0x79, | |
0x0a | |
}; | |
public static void main(String[] args) { | |
Scanner scanner = new Scanner(System.in); | |
int i; | |
System.out.println("Input 1 to encrypt or 2 to decrypt"); | |
int mode = scanner.nextInt(); | |
scanner.nextLine(); | |
String plaintext, ciphertext; | |
switch (mode) | |
{ | |
case 1: | |
System.out.println("Input plaintext"); | |
plaintext = scanner.nextLine(); | |
ciphertext = ""; | |
for(i=0; i<plaintext.length(); i++) | |
{ | |
ciphertext += key[plaintext.charAt(i) - 'a']; | |
} | |
System.out.println(ciphertext); | |
break; | |
case 2: | |
System.out.println("Input ciphertext"); | |
ciphertext = scanner.nextLine(); | |
plaintext = ""; | |
for(i=0; i<ciphertext.length(); i++) | |
{ | |
plaintext += decipher(ciphertext.charAt(i)); | |
} | |
System.out.println(plaintext); | |
} | |
scanner.close(); | |
} | |
public static char decipher(char cipher) | |
{ | |
int i; | |
for(i=0; i<key.length; i++) | |
{ | |
if(key[i] == cipher) | |
{ | |
return (char)(i+'a'); | |
} | |
} | |
return 0x00; | |
} | |
} |
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