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Search engine in cpp
Creating a full-fledged search engine in C++ is a complex and ambitious project that typically requires a significant amount of resources, expertise, and computational power. A full search engine, like Google, involves web crawling, indexing, ranking, and a user interface, and may not be a feasible project for a single developer. However, I can provide a simplified example of a basic text-based search engine to get you started:
Source code
#include <iostream>
#include <string>
#include <vector>
#include <map>
std::map<std::string, std::vector<std::string>> index;
void indexDocument(const std::string& document, const std::string& documentName) {
std::string word;
std::istringstream iss(document);
while (iss >> word) {
// Remove punctuation and convert to lowercase (simplified)
std::string cleanedWord = "";
for (char c : word) {
if (isalpha(c)) {
cleanedWord += tolower(c);
}
}
if (!cleanedWord.empty()) {
index[cleanedWord].push_back(documentName);
}
}
}
std::vector<std::string> search(const std::string& query) {
std::string cleanedQuery = "";
for (char c : query) {
if (isalpha(c)) {
cleanedQuery += tolower(c);
}
}
if (index.find(cleanedQuery) != index.end()) {
return index[cleanedQuery];
} else {
return {};
}
}
int main() {
std::string documentName, document;
// Index some example documents
documentName = "document1.txt";
document = "This is an example document for the search engine.";
indexDocument(document, documentName);
documentName = "document2.txt";
document = "C++ is a programming language used to build software applications.";
indexDocument(document, documentName);
std::string query;
std::cout << "Enter a search query: ";
std::cin.ignore();
std::getline(std::cin, query);
std::vector<std::string> results = search(query);
if (!results.empty()) {
std::cout << "Search results:\n";
for (const std::string& result : results) {
std::cout << result << "\n";
}
} else {
std::cout << "No results found for the query.\n";
}
return 0;
}
This example demonstrates a simplified text-based search engine. It allows you to index and search documents by keywords. The search engine tokenizes the input text, removes punctuation and converts words to lowercase for a basic search functionality. This is far from a production-grade search engine but serves as a starting point for learning about the basic principles involved.
To build a more advanced search engine, you would need to consider issues like web crawling, ranking algorithms, distributed systems, and much more. Building a fully-featured search engine is a massive project that typically involves teams of engineers and significant computational resources.
