From 0927d1b42a48541649554735bf23301ee6d6a61b Mon Sep 17 00:00:00 2001
From: GorokhovDE <GorokhovDE@mpei.ru>
Date: Tue, 24 Dec 2024 09:58:29 +0300
Subject: [PATCH] =?UTF-8?q?=D0=98=D1=81=D0=BF=D1=80=D0=B0=D0=B2=D0=BB?=
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---
lab04/lab04-pdf.cpp | 186 ++++++++++++++++++++++++++++++--------------
lab04/text.txt | 3 +
2 files changed, 131 insertions(+), 58 deletions(-)
create mode 100644 lab04/text.txt
diff --git a/lab04/lab04-pdf.cpp b/lab04/lab04-pdf.cpp
index 1723855..aeff0d4 100644
--- a/lab04/lab04-pdf.cpp
+++ b/lab04/lab04-pdf.cpp
@@ -1,107 +1,177 @@
#include <iostream>
-#include <cassert>
-#include <cstdint> // ��� uint8_t, uint16_t
-#include <cstring> // ��� ������ � C-style ��������
-#include <iomanip> // ��� ������ � ������� hex
+#include <fstream>
+#include <iomanip>
+#include <cstring>
+#include <cstdint>
+#include <cstddef>
+#include <string>
-using namespace std;
-
-// ������ ����� � ����������������� ����
+// 1. ������� ��� ������ ������
void print_in_hex(uint8_t byte) {
- cout << hex << uppercase << (byte >> 4) << (byte & 0x0F) << ' ';
+ std::cout << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(byte) << ' ';
}
-// ������ ������� � ����������������� ����
void print_in_hex(const void* data, size_t size) {
- const uint8_t* bytes = reinterpret_cast<const uint8_t*>(data);
- for (size_t i = 0; i < size; i++) {
+ const uint8_t* bytes = static_cast<const uint8_t*>(data);
+ for (size_t i = 0; i < size; ++i) {
print_in_hex(bytes[i]);
- if ((i + 1) % 16 == 0) cout << '\n';
+ if ((i + 1) % 16 == 0) std::cout << '\n';
}
- cout << dec << '\n'; // ���������� ���������� ������
+ std::cout << '\n';
}
-// ������ ����� � �������� ����
void print_in_binary(uint8_t byte) {
for (int i = 7; i >= 0; --i) {
- cout << ((byte >> i) & 1);
+ std::cout << ((byte >> i) & 1);
}
- cout << ' ';
+ std::cout << ' ';
}
-// ������ ������� � �������� ����
void print_in_binary(const void* data, size_t size) {
- const uint8_t* bytes = reinterpret_cast<const uint8_t*>(data);
- for (size_t i = 0; i < size; i++) {
+ const uint8_t* bytes = static_cast<const uint8_t*>(data);
+ for (size_t i = 0; i < size; ++i) {
print_in_binary(bytes[i]);
- if ((i + 1) % 4 == 0) cout << '\n';
+ if ((i + 1) % 4 == 0) std::cout << '\n';
}
- cout << '\n';
+ std::cout << '\n';
}
+// 2. ����������� ��� ��������� ��������
void bitwise_calculator() {
uint16_t operand1, operand2;
- char op;
- cout << "Enter first operand (uint16_t): ";
- cin >> operand1;
- cout << "Enter operator (&, |, ^): ";
- cin >> op;
- cout << "Enter second operand (uint16_t): ";
- cin >> operand2;
-
- uint16_t result = 0;
- switch (op) {
+ char operation;
+
+ std::cout << "Enter the first operand: ";
+ std::cin >> operand1;
+ std::cout << "Enter the operator (&, |, ^): ";
+ std::cin >> operation;
+ std::cout << "Enter the second operand: ";
+ std::cin >> operand2;
+
+ uint16_t result;
+ switch (operation) {
case '&': result = operand1 & operand2; break;
case '|': result = operand1 | operand2; break;
case '^': result = operand1 ^ operand2; break;
default:
- cerr << "Invalid operator!\n";
+ std::cerr << "Invalid operator!\n";
return;
}
- cout << "Result in hex: ";
+ std::cout << "Result in hexadecimal format: ";
print_in_hex(&result, sizeof(result));
- cout << "Result in binary: ";
+ std::cout << "Result in binary format: ";
print_in_binary(&result, sizeof(result));
}
+// 3. ������ �� �����������
struct Student {
- char name[17]; // ��� ��������
- uint16_t year; // ��� �����������
- float average_score; // ������� ����
- uint8_t gender : 1; // ���: 0 - �������, 1 - �������
- uint8_t completed_courses; // ���������� ������
- Student* group_leader; // ��������� �� ��������
+ char name[17];
+ uint16_t year_of_admission;
+ float gpa;
+ unsigned gender : 1;
+ uint8_t completed_courses;
+ Student* group_leader;
};
-void test_students() {
+void analyze_students() {
Student students[3] = {
- {"Alice", 2020, static_cast<float>(4.5), 0, 3, nullptr},
- {"Bob", 2021, static_cast<float>(4.0), 1, 2, nullptr},
- {"Charlie", 2020, static_cast<float>(4.2), 1, 5, nullptr}
+ {"Alice", 2020, 3.8, 0, 5, nullptr},
+ {"Bob", 2020, 3.5, 1, 5, nullptr},
+ {"Charlie", 2019, 4.0, 1, 6, nullptr}
};
- // ������ ������� � ��������
- cout << "Array address: " << &students << ", size: " << sizeof(students) << " bytes\n";
+ students[0].group_leader = &students[2];
+ students[1].group_leader = &students[2];
+
+ std::cout << "Array address: " << &students << "\n";
+ std::cout << "Array size: " << sizeof(students) << " bytes\n\n";
+
for (size_t i = 0; i < 3; ++i) {
- cout << "Student " << i + 1 << " address: " << &students[i] << ", size: " << sizeof(students[i]) << " bytes\n";
+ std::cout << "Student " << i + 1 << ":\n";
+ std::cout << " Address: " << &students[i] << "\n";
+ std::cout << " Size: " << sizeof(students[i]) << " bytes\n";
}
- // ������ ���� �����
- for (const auto& student : students) {
- cout << "Name: " << student.name << ", Address: " << (void*)student.name << '\n';
- cout << "Year: " << student.year << ", Address: " << &student.year << '\n';
- cout << "Average Score: " << student.average_score << ", Address: " << &student.average_score << '\n';
- cout << "Gender: " << static_cast<int>(student.gender) << '\n';
- cout << "Completed Courses: " << static_cast<int>(student.completed_courses) << '\n';
- cout << "Group Leader Address: " << student.group_leader << "\n\n";
+ Student& student = students[0];
+ std::cout << "\nAnalysis of Alice's fields:\n";
+ std::cout << " Name: Address=" << static_cast<void*>(student.name)
+ << ", Offset=" << offsetof(Student, name)
+ << ", Size=" << sizeof(student.name) << '\n';
+ std::cout << " Year of admission: Address=" << &student.year_of_admission
+ << ", Offset=" << offsetof(Student, year_of_admission)
+ << ", Size=" << sizeof(student.year_of_admission) << '\n';
+ std::cout << " GPA: Address=" << &student.gpa
+ << ", Offset=" << offsetof(Student, gpa)
+ << ", Size=" << sizeof(student.gpa) << '\n';
+ std::cout << " Number of courses: Address=" << static_cast<void*>(&student.completed_courses)
+ << ", Offset=" << offsetof(Student, completed_courses)
+ << ", Size=" << sizeof(student.completed_courses) << '\n';
+}
+
+// 4. ��������� ���������� �����
+void process_text_file() {
+ const char* filename = "text.txt";
+
+ std::ifstream file(filename, std::ios::binary);
+ if (!file) {
+ std::cerr << "File open error!\n";
+ return;
}
+
+ file.seekg(0, std::ios::end);
+ size_t filesize = file.tellg();
+ file.seekg(0, std::ios::beg);
+
+ char* buffer = new char[filesize];
+ file.read(buffer, filesize);
+
+ std::cout << "Enter the string to search for: ";
+ char search_str[256];
+ std::cin.ignore();
+ std::cin.getline(search_str, 256);
+
+ size_t count = 0;
+ char* pos = buffer;
+ while ((pos = strstr(pos, search_str)) != nullptr) {
+ ++count;
+ pos += strlen(search_str);
+ }
+
+ std::cout << "Number of occurrences: " << count << "\n";
+
+ delete[] buffer;
}
int main() {
- // ����� �������
- bitwise_calculator();
- test_students();
+ std::cout << "Choose a task: 1 - Print, 2 - Calculator, 3 - Students, 4 - File\n";
+ int choice;
+ std::cin >> choice;
+
+ switch (choice) {
+ case 1:
+ // ������������ ������� ������
+ {
+ uint16_t data = 0xABCD;
+ std::cout << "Hexadecimal output:\n";
+ print_in_hex(&data, sizeof(data));
+ std::cout << "Binary output:\n";
+ print_in_binary(&data, sizeof(data));
+ }
+ break;
+ case 2:
+ bitwise_calculator();
+ break;
+ case 3:
+ analyze_students();
+ break;
+ case 4:
+ process_text_file();
+ break;
+ default:
+ std::cerr << "Invalid choice!\n";
+ }
+
return 0;
}
diff --git a/lab04/text.txt b/lab04/text.txt
new file mode 100644
index 0000000..717d947
--- /dev/null
+++ b/lab04/text.txt
@@ -0,0 +1,3 @@
+Hello, world!
+This is a test file.
+Hello again!