diff --git a/Quadratic Equation.sln b/Quadratic Equation.sln
new file mode 100644
index 0000000..499fe18
--- /dev/null
+++ b/Quadratic Equation.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.7.34031.279
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Quadratic Equation", "Quadratic Equation\Quadratic Equation.vcxproj", "{E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|x64 = Debug|x64
+ Debug|x86 = Debug|x86
+ Release|x64 = Release|x64
+ Release|x86 = Release|x86
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Debug|x64.ActiveCfg = Debug|x64
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Debug|x64.Build.0 = Debug|x64
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Debug|x86.ActiveCfg = Debug|Win32
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Debug|x86.Build.0 = Debug|Win32
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Release|x64.ActiveCfg = Release|x64
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Release|x64.Build.0 = Release|x64
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Release|x86.ActiveCfg = Release|Win32
+ {E9ED283D-3B58-48DB-B2D3-A4FC15D34B91}.Release|x86.Build.0 = Release|Win32
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {E5710D74-B760-469A-9C37-5CE7CFAEFDE7}
+ EndGlobalSection
+EndGlobal
diff --git a/Quadratic Equation.vcxproj b/Quadratic Equation.vcxproj
new file mode 100644
index 0000000..30da921
--- /dev/null
+++ b/Quadratic Equation.vcxproj
@@ -0,0 +1,136 @@
+
+
+
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+ Win32
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+ Release
+ x64
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+ 17.0
+ Win32Proj
+ {e9ed283d-3b58-48db-b2d3-a4fc15d34b91}
+ QuadraticEquation
+ 10.0
+
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+ true
+ WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
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+ WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
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+ true
+ _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+ CompileAsC
+
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+ true
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+ NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
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\ No newline at end of file
diff --git a/Quadratic Equation.vcxproj.filters b/Quadratic Equation.vcxproj.filters
new file mode 100644
index 0000000..1d88bc2
--- /dev/null
+++ b/Quadratic Equation.vcxproj.filters
@@ -0,0 +1,22 @@
+
+
+
+
+ {4FC737F1-C7A5-4376-A066-2A32D752A2FF}
+ cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx
+
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+ {93995380-89BD-4b04-88EB-625FBE52EBFB}
+ h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+
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+ {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+ rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+
+
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+ Исходные файлы
+
+
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\ No newline at end of file
diff --git a/Quadratic Equation.vcxproj.user b/Quadratic Equation.vcxproj.user
new file mode 100644
index 0000000..88a5509
--- /dev/null
+++ b/Quadratic Equation.vcxproj.user
@@ -0,0 +1,4 @@
+
+
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\ No newline at end of file
diff --git a/Solve.c b/Solve.c
new file mode 100644
index 0000000..4b35d21
--- /dev/null
+++ b/Solve.c
@@ -0,0 +1,72 @@
+#pragma warning(disable:4996)
+#define _CRT_SECURE_NO_WARNINGS
+#define _USE_MATH_DEFINES
+
+#include
+#include
+#include
+
+void ReadingFromFile(const char *f, long float *a, long float *b, long float *c) {
+ FILE* F = fopen(f, "r");
+ if (!F) {
+ printf("Error occured while opening file");
+ exit(0);
+ }
+ if (fscanf(F, "%lf %lf %lf", a, b, c) == EOF) {
+ printf("Incorrect file format");
+ exit(0);
+ }
+ fclose(F);
+}
+
+int Solve(long float a, long float b, long float c, long float* root1, long float* root2) {
+ long float discriminant = b * b - 4 * a * c;
+
+ if (discriminant < 0) {
+ return 0;
+ }
+ else if (discriminant == 0) {
+ *root1 = -b / (2 * a);
+ return 1;
+ }
+ else {
+ *root1 = (-b + sqrt(discriminant)) / (2 * a);
+ *root2 = (-b - sqrt(discriminant)) / (2 * a);
+ return 2;
+ }
+}
+
+void WrittingToFile(const char* f, int count_roots, long float root1, long float root2) {
+ FILE* F = fopen(f, "w");
+ if (!F) {
+ printf("Error occured while opening file");
+ exit(0);
+ }
+
+ if (count_roots == 0) {
+ fprintf(F, "There are no real roots.\n");
+ }
+ else if (count_roots == 1) {
+ fprintf(F, "Root: %.6lf\n", root1);
+ }
+ else if (count_roots == 2) {
+ fprintf(F, "Roots: %.6lf, %.6lf\n", root1, root2);
+ }
+
+ fclose(F);
+}
+
+
+int main() {
+ char* coeff = "coeff.txt";
+ char* roots = "solve.txt";
+ long float a, b, c;
+ ReadingFromFile(coeff, &a, &b, &c);
+ long float root1, root2;
+ int count_roots = Solve(a, b, c, &root1, &root2);
+ WrittingToFile(roots, count_roots, root1, root2);
+ return 1;
+}
+
+
+
diff --git a/coeff.txt b/coeff.txt
new file mode 100644
index 0000000..1c33abb
--- /dev/null
+++ b/coeff.txt
@@ -0,0 +1 @@
+1 2 1
diff --git a/solve.txt b/solve.txt
new file mode 100644
index 0000000..bf3e4f0
--- /dev/null
+++ b/solve.txt
@@ -0,0 +1 @@
+Root: -1.000000