2023-11-8

2023-11-08 19:25:23 +08:00
parent 0120d56856
commit e382a92eee
31 changed files with 1785 additions and 0 deletions
--- a/Classwork6/Classwork6.sln
+++ b/Classwork6/Classwork6.sln
@@ -0,0 +1,71 @@
+
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--- a/Classwork6/S6_1/S6_1.cpp
+++ b/Classwork6/S6_1/S6_1.cpp
@@ -0,0 +1,20 @@
+#include <iostream>
+using namespace std;
+float fun(float x)
+{
+	float y;
+	y = 2 * x * x + 5 * x + 3;
+	return y;
+}
+int main()
+{
+	float y1, y2;
+	y1 = fun(1.0);
+	y2 = fun(1.2);
+	cout << "y1=" << y1 << endl;
+	cout << "y2=" << y2 << endl;
+	return 0;
+}
+
+// y1=10
+// y2=11.88
--- a/Classwork6/S6_1/S6_1.vcxproj
+++ b/Classwork6/S6_1/S6_1.vcxproj
@@ -0,0 +1,135 @@
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+++ b/Classwork6/S6_1/S6_1.vcxproj.filters
@@ -0,0 +1,22 @@
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--- a/Classwork6/S6_2/S6_2.cpp
+++ b/Classwork6/S6_2/S6_2.cpp
@@ -0,0 +1,27 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+float f(float x)
+{
+	float y;
+	y = x * x + 3 * x - 4;
+	return y;
+}
+float df(float x)
+{
+	float y;
+	y = 2 * x + 3;
+	return y;
+}
+int main()
+{
+	float x1, x0;
+	x1 = 0;
+	do
+	{
+		x0 = x1;
+		x1 = x0 - f(x0) / df(x0);
+	} while (abs(f(x1)) > 10e-5);
+	cout << "x=" << x1 << endl;
+	return 0;
+}
--- a/Classwork6/S6_2/S6_2.vcxproj
+++ b/Classwork6/S6_2/S6_2.vcxproj
@@ -0,0 +1,135 @@
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--- a/Classwork6/S6_3/S6_3.cpp
+++ b/Classwork6/S6_3/S6_3.cpp
@@ -0,0 +1,30 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+float f(float x)
+{
+	return x * x + 3 * x - 4;
+}
+int main()
+{
+	float x1, x2, x0;
+	do
+	{
+		cout << "请输入初值x1和x2:";
+		cin >> x1 >> x2;
+	} while ((f(x1) * f(x2)) > 0);
+	do
+	{
+		x0 = (x1 + x2) / 2;
+		if (f(x0) * f(x1) > 0)
+			x1 = x0;
+		else
+			x2 = x0;
+	} while (fabs(f(x0)) > 1e-5);
+	cout << "x0=" << x0 << endl;
+	return 0;
+}
+
+// 0 2 -> 1
+// -5 0 -> -4
+// 0 -2 x
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+++ b/Classwork6/S6_3/S6_3.vcxproj
@@ -0,0 +1,135 @@
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--- a/Classwork6/S6_3/S6_3.vcxproj.filters
+++ b/Classwork6/S6_3/S6_3.vcxproj.filters
@@ -0,0 +1,22 @@
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+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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+    <Filter Include="源文件">
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+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
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+</Project>
--- a/Classwork6/S6_4/S6_4.cpp
+++ b/Classwork6/S6_4/S6_4.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+float f(float x)
+{
+	float y;
+	y = x * x + 3 * x - 4;
+	return y;
+}
+int main()
+{
+	float x1, x2, x0;
+	do
+	{
+		cout << "请输入初值x1和x2:";
+		cin >> x1 >> x2;
+	} while ((f(x1) * f(x2)) > 0);
+	do
+	{
+		x0 = (x1 * f(x2) - x2 * f(x1)) / (f(x2) - f(x1));
+		if (f(x0) * f(x1) > 0)
+			x1 = x0;
+		else
+			x2 = x0;
+	} while (fabs(f(x0)) > 1e-5);
+	cout << "x0=" << x0 << endl;
+	return 0;
+}
+
+// 0 2 -> 0.999999
+// -5 4 -> -4
+// 0 -2 x
--- a/Classwork6/S6_4/S6_4.vcxproj
+++ b/Classwork6/S6_4/S6_4.vcxproj
@@ -0,0 +1,135 @@
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--- a/Classwork6/S6_5/S6_5.cpp
+++ b/Classwork6/S6_5/S6_5.cpp
@@ -0,0 +1,26 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+float f(float x)
+{
+	return x * x + 3 * x - 4;
+}
+float df(float x)
+{
+	return 2 * x + 3;
+}
+float calc(float a)
+{
+	float b;
+	b = a - f(a) / df(a);
+	if (fabs(f(b)) < 10e-5)
+		return b;
+	else
+		calc(b);
+}
+int main()
+{
+	float x = 0;
+	cout << calc(x) << endl;
+	return 0;
+}
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+++ b/Classwork6/S6_5/S6_5.vcxproj
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
--- a/Classwork6/S6_5/S6_5.vcxproj.filters
+++ b/Classwork6/S6_5/S6_5.vcxproj.filters
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="源文件">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="头文件">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="资源文件">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="S6_5.cpp">
+      <Filter>源文件</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
--- a/Classwork6/实验报告.doc
+++ b/Classwork6/实验报告.doc