您好,登錄后才能下訂單哦!
以下是一個簡單的C++實現(xiàn),使用LZSS算法來壓縮和解壓縮數(shù)據(jù):
#include <iostream>
#include <string>
#include <vector>
#include <map>
// 壓縮函數(shù)
std::string compressLZSS(const std::string& data) {
std::string compressedData;
std::map<std::string, int> dictionary;
int dictSize = 256;
for (int i = 0; i < 256; i++) {
dictionary[std::string(1, i)] = i;
}
std::string current;
for (char c : data) {
std::string newStr = current + c;
if (dictionary.find(newStr) != dictionary.end()) {
current = newStr;
} else {
compressedData += std::to_string(dictionary[current]) + ",";
dictionary[newStr] = dictSize++;
current = c;
}
}
if (!current.empty()) {
compressedData += std::to_string(dictionary[current]);
}
return compressedData;
}
// 解壓縮函數(shù)
std::string decompressLZSS(const std::string& compressedData) {
std::vector<std::string> dictionary;
int dictSize = 256;
for (int i = 0; i < 256; i++) {
dictionary.push_back(std::string(1, i));
}
std::string decompressedData;
std::string current;
for (char c : compressedData) {
int code = std::stoi(std::string(1, c));
std::string entry;
if (code < dictSize) {
entry = dictionary[code];
} else if (code == dictSize) {
entry = current + current[0];
} else {
throw "Invalid compressed data";
}
decompressedData += entry;
if (!current.empty()) {
dictionary.push_back(current + entry[0]);
}
current = entry;
}
return decompressedData;
}
int main() {
std::string data = "hellohellohelloworld";
// 壓縮數(shù)據(jù)
std::string compressedData = compressLZSS(data);
std::cout << "Compressed data: " << compressedData << std::endl;
// 解壓縮數(shù)據(jù)
std::string decompressedData = decompressLZSS(compressedData);
std::cout << "Decompressed data: " << decompressedData << std::endl;
return 0;
}
這個實現(xiàn)使用了一個簡單的字典來存儲已經(jīng)出現(xiàn)過的字符串,并使用其編碼來代替原始數(shù)據(jù)。壓縮函數(shù)將輸入數(shù)據(jù)壓縮為一串逗號分隔的編碼數(shù)字,而解壓縮函數(shù)則將這些數(shù)字解碼回原始數(shù)據(jù)。請注意,這個實現(xiàn)只是一個簡單的示例,實際應用中可能需要更復雜的處理邏輯和錯誤處理。
免責聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。