C++: عمليات الملفات المتقدمة

#include <iostream>
#include <fstream>

int main() {
 std::ifstream file("data.txt");
 
 if (!file) {
 std::cerr << "Unable to open file" << std::endl;
 return 1;
 }
 
 std::cout << "File opened successfully" << std::endl;
 file.close();
 
 return 0;
}

File opened successfully

#include <iostream>
#include <fstream>
#include <string>

int main() {
 std::ifstream file("data.txt");
 std::string line;
 int count = 0;
 
 while (std::getline(file, line)) {
 count++;
 }
 
 std::cout << "Number of lines: " << count << std::endl;
 file.close();
 
 return 0;
}

#include <iostream>
#include <fstream>

struct Student {
 char name[50];
 int age;
 double score;
};

int main() {
 Student s = {"Zhang San", 20, 85.5};
 
 // الكتابة إلى ملف
 std::ofstream out("student.txt");
 out << s.name << std::endl;
 out << s.age << std::endl;
 out << s.score << std::endl;
 out.close();
 
 // القراءة من ملف
 Student s2;
 std::ifstream in("student.txt");
 in >> s2.name >> s2.age >> s2.score;
 in.close();
 
 std::cout << "Name: " << s2.name << std::endl;
 std::cout << "Age: " << s2.age << std::endl;
 std::cout << "Score: " << s2.score << std::endl;
 
 return 0;
}

#include <iostream>
#include <fstream>

struct Student {
 char name[50];
 int age;
 double score;
};

int main() {
 Student s = {"Zhang San", 20, 85.5};
 
 // كتابة ملف ثنائي
 std::ofstream out("student.bin", std::ios::binary);
 out.write(reinterpret_cast<char*>(&s), sizeof(s));
 out.close();
 
 // قراءة ملف ثنائي
 Student s2;
 std::ifstream in("student.bin", std::ios::binary);
 in.read(reinterpret_cast<char*>(&s2), sizeof(s2));
 in.close();
 
 std::cout << "Name: " << s2.name << std::endl;
 std::cout << "Age: " << s2.age << std::endl;
 std::cout << "Score: " << s2.score << std::endl;
 
 return 0;
}

#include <iostream>
#include <fstream>

int main() {
 std::fstream file("data.txt", std::ios::in | std::ios::out);
 
 // القفز إلى البايت العاشر
 file.seekp(10);
 
 // كتابة بيانات (الكتابة فوق)
 file << "Hello";
 
 file.close();
 return 0;
}

Hello, File!
C++ File Operations

#include <iostream>
#include <fstream>

int main() {
 std::ifstream file("data.txt");
 std::string line;
 
 while (true) {
 std::getline(file, line);
 
 if (file.eof()) {
 break; // الوصول إلى نهاية الملف
 }
 
 std::cout << line << std::endl;
 }
 
 file.clear(); // مسح الحالة للاستمرار في الاستخدام
 file.close();
 
 return 0;
}

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

struct Student {
 int id;
 char name[50];
 int age;
};

void saveStudents(const std::vectorStudent& students, const std::string& filename) {
 std::ofstream file(filename, std::ios::binary);
 for (const auto& s : students) {
 file.write(reinterpret_cast<const char*>(&s), sizeof(s));
 }
}

void loadStudents(std::vectorStudent& students, const std::string& filename) {
 std::ifstream file(filename, std::ios::binary);
 Student s;
 while (file.read(reinterpret_cast<char*>(&s), sizeof(s))) {
 students.push_back(s);
 }
}

int main() {
 std::vector<Student> students = {
 {1, "Zhang San", 20},
 {2, "Li Si", 21}
 };
 
 // حفظ
 saveStudents(students, "students.bin");
 
 // تحميل
 std::vectorStudent loaded;
 loadStudents(loaded, "students.bin");
 
 std::cout << "Loaded " << loaded.size() << " records" << std::endl;
 
 return 0;
}

Loaded 2 records

#include <iostream>
#include <fstream>
#include <string>

int main() {
    // الكتابة إلى ملف
    std::ofstream outFile("test.txt");
    outFile << "Hello, File!" << std::endl;
    outFile << "C++ File Operations" << std::endl;
    outFile.close();
    
    // القراءة من ملف
    std::ifstream inFile("test.txt");
    std::string line;
    while (std::getline(inFile, line)) {
        std::cout << line << std::endl;
    }
    inFile.close();
    
    return 0;
}

(program output)

Hello, File!
C++ File Operations