From dee39a3ff149a5b6eb95f29e0012b83cddaa3e54 Mon Sep 17 00:00:00 2001
From: Fromant <framanchannel@gmail.com>
Date: Thu, 20 Feb 2025 14:53:49 +0300
Subject: [PATCH 1/2] First lab completed

---
 lab1/CMakeLists.txt |  5 +++++
 lab1/lab1.cpp       | 42 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)
 create mode 100644 lab1/CMakeLists.txt
 create mode 100644 lab1/lab1.cpp

diff --git a/lab1/CMakeLists.txt b/lab1/CMakeLists.txt
new file mode 100644
index 0000000..e61174e
--- /dev/null
+++ b/lab1/CMakeLists.txt
@@ -0,0 +1,5 @@
+CMAKE_MINIMUM_REQUIRED(VERSION 3.20)
+
+project(LAB1 CXX)
+
+add_executable(LAB1 lab1.cpp)
\ No newline at end of file
diff --git a/lab1/lab1.cpp b/lab1/lab1.cpp
new file mode 100644
index 0000000..ae50019
--- /dev/null
+++ b/lab1/lab1.cpp
@@ -0,0 +1,42 @@
+#include <iostream>
+#include <array>
+#include <cmath>
+
+std::array<double, 3> read_polynom_from_stdin() {
+	std::array<double, 3> to_return{};
+	std::cout << "Quadratic equation ax^2+bx+c=0" << std::endl;
+	std::cout << "Write \"a\" coefficient numeric value: ";
+	std::cin >> to_return[0];
+	std::cout << "Write \"b\" coefficient numeric value: ";
+	std::cin >> to_return[1];
+	std::cout << "Write \"c\" coefficient numeric value: ";
+	std::cin >> to_return[2];
+	return to_return;
+}
+
+void solve_and_print_equation(const std::array<double, 3>& equation) {
+	//count discriminant
+	double discr = equation[1]*equation[1]-4*equation[0]*equation[2];
+	if(discr<0) {
+		std::cout << "There is no roots in real numbers" << std::endl;
+		return;
+	}
+	if(discr==0) {
+		double root = (-equation[1]+std::sqrt(discr))/2.0;
+		std::cout << "There is only one root in real numbers: " << root<< std::endl;
+		return;
+	}
+	//2 roots
+	double sqrt_discr_halfed = std::sqrt(discr)/2;
+	double minus_b_halfed = -equation[1]/2;
+	double root1 = minus_b_halfed + sqrt_discr_halfed;
+	double root2 = minus_b_halfed - sqrt_discr_halfed;
+	std::cout << "There are two real roots: " << root1<<"; " << root2<<std::endl;
+}
+
+int main() {
+	std::cout << "Lab 1 by Krutyanscky RI" << std::endl;
+	const auto eq = read_polynom_from_stdin();
+	solve_and_print_equation(eq);
+	return 0;
+}

From 90945470ac2f818ab3425ae4f324e5479f54004d Mon Sep 17 00:00:00 2001
From: Fromant <framanchannel@gmail.com>
Date: Fri, 28 Mar 2025 18:42:28 +0300
Subject: [PATCH 2/2] Changed reading from console to reading from file

---
 lab1/lab1.cpp | 60 ++++++++++++++++++++++++++++++---------------------
 1 file changed, 36 insertions(+), 24 deletions(-)

diff --git a/lab1/lab1.cpp b/lab1/lab1.cpp
index ae50019..b14ea67 100644
--- a/lab1/lab1.cpp
+++ b/lab1/lab1.cpp
@@ -1,42 +1,54 @@
 #include <iostream>
 #include <array>
 #include <cmath>
+#include <fstream>
 
-std::array<double, 3> read_polynom_from_stdin() {
+std::array<double, 3> read_polynom_from_file() {
 	std::array<double, 3> to_return{};
-	std::cout << "Quadratic equation ax^2+bx+c=0" << std::endl;
-	std::cout << "Write \"a\" coefficient numeric value: ";
-	std::cin >> to_return[0];
-	std::cout << "Write \"b\" coefficient numeric value: ";
-	std::cin >> to_return[1];
-	std::cout << "Write \"c\" coefficient numeric value: ";
-	std::cin >> to_return[2];
+	std::ifstream input("input.txt");
+
+	if (!input.is_open()) {
+		std::cerr << "Error: Could not open input file" << std::endl;
+		exit(1);
+	}
+
+	input >> to_return[0] >> to_return[1] >> to_return[2];
 	return to_return;
 }
 
-void solve_and_print_equation(const std::array<double, 3>& equation) {
-	//count discriminant
+void solve_and_write_equation(const std::array<double, 3>& equation) {
+	std::ofstream output("output.txt");
+
+	if (!output.is_open()) {
+		std::cerr << "Error: Could not open output file" << std::endl;
+		exit(1);
+	}
+
+	// Count discriminant
 	double discr = equation[1]*equation[1]-4*equation[0]*equation[2];
-	if(discr<0) {
-		std::cout << "There is no roots in real numbers" << std::endl;
+
+	if(discr < 0) {
+		output << "There is no roots in real numbers" << std::endl;
 		return;
 	}
-	if(discr==0) {
-		double root = (-equation[1]+std::sqrt(discr))/2.0;
-		std::cout << "There is only one root in real numbers: " << root<< std::endl;
+
+	if(discr == 0) {
+		double root = (-equation[1]+std::sqrt(discr))/(2*equation[0]);
+		output << "There is only one root in real numbers: " << root << std::endl;
 		return;
 	}
-	//2 roots
-	double sqrt_discr_halfed = std::sqrt(discr)/2;
-	double minus_b_halfed = -equation[1]/2;
-	double root1 = minus_b_halfed + sqrt_discr_halfed;
-	double root2 = minus_b_halfed - sqrt_discr_halfed;
-	std::cout << "There are two real roots: " << root1<<"; " << root2<<std::endl;
+
+	// 2 roots
+	double sqrt_discr = std::sqrt(discr);
+	double denominator = 2*equation[0];
+	double root1 = (-equation[1] + sqrt_discr) / denominator;
+	double root2 = (-equation[1] - sqrt_discr) / denominator;
+	output << "There are two real roots: " << root1 << "; " << root2 << std::endl;
 }
 
 int main() {
 	std::cout << "Lab 1 by Krutyanscky RI" << std::endl;
-	const auto eq = read_polynom_from_stdin();
-	solve_and_print_equation(eq);
+	const auto eq = read_polynom_from_file();
+	solve_and_write_equation(eq);
 	return 0;
-}
+}
\ No newline at end of file