拉丁字母密码
原文:https://www . geesforgeks . org/Latin-alphabet-cipher-encryption/
拉丁字母密码加密技术是最早和最简单的数据加密技术之一。这只是一种替换密码技术，也就是说，给定文本的每个字母都被按字母顺序表示的相应数字所替换。例如，我们给了一个字符串“大家好”，那么它的拉丁密码加密将是“8 5 12 12 15 5 22 5 18 25 15 14 5”。
示例:
Input : geeksforgeeks
Output : Encrypted Code using Latin Alphabet
7 5 5 11 19 6 15 18 7 5 5 11 19
Input : hello everyone
Output : Encrypted Code using Latin Alphabet
8 5 12 12 15 5 22 5 18 25 15 14 5
先决条件: isalpha()和 isdigit()函数在 C/C++中使用示例 下面是将给定字符串转换为其拉丁字母密码的程序:
C++
// Latin Alphabet Cipher Encryption header files
#include <bits/stdc++.h>
// function for calculating the encryption
void cipher(char str[])
{
for (int i = 0; str[i] != '\0'; i++) {
if (isalpha(str[i]) == 0 && str[i] != ' ') {
printf("Enter only alphabets and space\n");
return;
}
}
printf("Encrypted Code using Latin Alphabet\n");
for (int i = 0; str[i] != '\0'; i++) {
if (str[i] >= 'A' && str[i] <= 'Z')
printf("%d ", str[i] - 'A' + 1);
else if (str[i] >= 'a' && str[i] <= 'z')
printf("%d ", str[i] - 'a' + 1);
if (str[i] == ' ')
printf("%c", str[i]);
}
printf("\n");
}
// driver code
int main()
{
char str[] = "geeksforgeeks";
cipher(str);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
// Java program to demonstrate
// Latin Alphabet Cipher
class LatinCipher
{
// function for calculating the encryption
static void cipher(String str)
{
for (int i = 0; i < str.length(); i++)
{
if (!Character.isLetter(str.charAt(i)) &&
str.charAt(i) != ' ')
{
System.out.println("Enter only alphabets and space");
return;
}
}
System.out.println("Encrypted Code using Latin Alphabet");
for (int i = 0; i < str.length(); i++)
{
if (str.charAt(i) >= 'A' && str.charAt(i) <= 'Z')
{
System.out.print(str.charAt(i) - 'A' + 1 + " ");
}
else if (str.charAt(i) >= 'a' && str.charAt(i) <= 'z')
{
System.out.print(str.charAt(i) - 'a' + 1 + " ");
}
if (str.charAt(i) == ' ')
System.out.print(str.charAt(i));
}
System.out.println();
}
// Driver Code
public static void main(String[] args)
{
String str = "geeksforgeeks";
cipher(str);
}
}
// This code is contributed by Vivekkumar Singh
Python 3
# Python program to demonstrate
# Latin Alphabet Cipher
# function for calculating the encryption
def cipher(str):
for i in range(len(str)):
if str[i].isalpha() == 0 and str[i] != " ":
print("Enter only alphabets and space")
return
print("Encrypted Code using Latin Alphabet")
for i in range(len(str)):
if str[i] >= "A" and str[i] <= "Z":
print(ord(str[i])-ord("A")+1, end=" ")
elif str[i] >= "a" and str[i] <= 'z':
print(ord(str[i])-ord("a")+1, end=" ")
if str[i] == " ":
print(str[i])
print()
# Driver Code
if __name__ == "__main__":
str = "geeksforgeeks"
cipher(str)
# This code is contributed by
# sanjeev2552
C
// C# program to demonstrate
// Latin Alphabet Cipher
using System;
public class LatinCipher
{
// function for calculating the encryption
static void cipher(String str)
{
for (int i = 0; i < str.Length; i++)
{
if (!char.IsLetter(str[i]) &&
str[i] != ' ')
{
Console.WriteLine("Enter only alphabets and space");
return;
}
}
Console.WriteLine("Encrypted Code using Latin Alphabet");
for (int i = 0; i < str.Length; i++)
{
if (str[i] >= 'A' && str[i] <= 'Z')
{
Console.Write(str[i] - 'A' + 1 + " ");
}
else if (str[i] >= 'a' && str[i] <= 'z')
{
Console.Write(str[i] - 'a' + 1 + " ");
}
if (str[i] == ' ')
Console.Write(str[i]);
}
Console.WriteLine();
}
// Driver Code
public static void Main(String[] args)
{
String str = "geeksforgeeks";
cipher(str);
}
}
// This code has been contributed by 29AjayKumar
服务器端编程语言（Professional Hypertext Preprocessor 的缩写）
<?php
// Latin Alphabet Cipher
// Encryption header files
// function for calculating
// the encryption
function cipher($str)
{
if (!ctype_alpha($str))
{
printf("Enter only " +
"alphabets and space\n");
return;
}
printf("Encrypted Code using ");
printf("Latin Alphabet\n");
for ($i = 0; $i < strlen($str); $i++)
{
if ($str[$i] >= 'A' &&
$str[$i] <= 'Z')
echo (ord($str[$i]) -
65 + 1). " ";
else if ($str[$i] >= 'a' &&
$str[$i] <= 'z')
echo (ord($str[$i]) -
97 + 1). " ";
}
echo "\n";
}
// Driver Code
$str = "geeksforgeeks";
cipher($str);
// This code is contributed by mits.
?>
java 描述语言
<script>
// JavaScript program to demonstrate
// Latin Alphabet Cipher
// function for calculating the encryption
function cipher(str) {
for (var i = 0; i < str.length; i++) {
if (!isLetter(str[i]) && str[i] !== " ") {
document.write("Enter only alphabets and space");
return;
}
}
document.write("Encrypted Code using Latin Alphabet <br>");
for (var i = 0; i < str.length; i++) {
if (str[i] >= "A" && str[i] <= "Z") {
document.write(str[i].charCodeAt(0)
- "A".charCodeAt(0) + 1 + "");
}
else if (str[i] >= "a" && str[i] <= "z") {
document.write(str[i].charCodeAt(0)
- "a".charCodeAt(0) + 1 + " ");
}
if (str[i] == " ")
document.write(str[i]);
}
document.write("<br>");
}
//check isLetter
function isLetter(str) {
return str.length === 1 && str.match(/[a-z]/i);
}
// Driver Code
var str = "geeksforgeeks";
cipher(str);
</script>
Output:
Encrypted Code using Latin Alphabet
7 5 5 11 19 6 15 18 7 5 5 11 19
版权属于：月萌API www.moonapi.com，转载请注明出处
