2023-12-18

2023-12-18 23:29:15 +08:00
parent 117bf4ce75
commit 5667dabd66
42 changed files with 2425 additions and 0 deletions
--- a/Classwork12/Classwork12.sln
+++ b/Classwork12/Classwork12.sln
@@ -0,0 +1,61 @@
+
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--- a/Classwork12/S12_1/S12_1.cpp
+++ b/Classwork12/S12_1/S12_1.cpp
@@ -0,0 +1,28 @@
+#include <iostream>
+using namespace std;
+void fun(int* w, int p, int n)
+{
+	int t, i, j;
+	for (i = 0; i <= p; i++)
+	{
+		t = *w;
+		for (j = 0; j < n - 1; j++)
+			*(w + j) = *(w + j + 1);
+		*(w + j) = t;
+	}
+}
+int main()
+{
+	int a[] = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 };
+	int p;
+	cout << "Input p:";
+	cin >> p;
+	int n = sizeof(a) / sizeof(int);
+	fun(a, p, n);
+	for (int i = 0; i < n; i++)
+		cout << a[i] << '\t';
+	cout << endl;
+	return 0;
+}
+
+// 4 -> 6       7       8       9       10      11      12      13      14      15      1       2       3       4       5
--- a/Classwork12/S12_1/S12_1.vcxproj
+++ b/Classwork12/S12_1/S12_1.vcxproj
@@ -0,0 +1,135 @@
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--- a/Classwork12/S12_2/S12_2.cpp
+++ b/Classwork12/S12_2/S12_2.cpp
@@ -0,0 +1,40 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+double f1(double x)
+{
+	return 1.0 / (2 + sin(x));
+}
+double f2(double x)
+{
+	return 1.0 / (2 - cos(x));
+}
+double f3(double x)
+{
+	return (1 + x) / (1 + x * x);
+}
+double integral(double (*pf)(double), int n, double a, double b)
+{
+	double h;
+	h = (b - a) / n;
+	double result;
+	result = (pf(a) + pf(b)) / 2;
+	for (int i = 1; i < n; i++)
+		result = result + pf(a + i * h) + pf(a + (i + 1) * h);
+	result = result * h;
+	return result;
+}
+int main(void)
+{
+	cout << "f1(x):" << '\t';
+	cout << "n = 1000 " << integral(f1, 1000, 1.0, 2.0) << endl;
+	cout << "f2(x):" << '\t';
+	cout << "n = 2000 " << integral(f2, 2000, 2.0, 3.0) << endl;
+	cout << "f3(x):" << '\t';
+	cout << "n = 3000 " << integral(f3, 3000, 2.0, 4.0) << endl;
+	return 0;
+}
+
+// f1(x) : n = 1000 0.676267
+// f2(x) : n = 2000 0.725125
+// f3(x) : n = 3000 1.66061
--- a/Classwork12/S12_2/S12_2.vcxproj
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--- a/Classwork12/S12_3/S12_3.cpp
+++ b/Classwork12/S12_3/S12_3.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+int main()
+{
+	int a[16] = { 55 };
+	for (int i = 1; i < 16; i++)
+		*(a + i) = (15 * (*(a + i - 1)) + 97) % 256;
+	cout << "a数组元素为：" << endl;
+	for (int i = 0; i < 16; i++)
+		cout << *(a + i) << "\t";
+	double average = 0;
+	for (int i = 0; i < 16; i++)
+		average += *(a + i);
+	average /= 16;
+	cout << "\n平均值 = " << average << endl;
+	int max = average, num;
+	for (int i = 0; i < 16; i++)
+		if (abs(*(a + i) - average) > abs(max - average))
+		{
+			max = *(a + i);
+			num = i;
+		}
+	cout << "最大值 = " << max << endl;
+	cout << "删除" << max << "后的数组元素：" << endl;
+	for (int i = 0; i < 16; i++)
+	{
+		if (i == num)
+			continue;
+		cout << *(a + i) << "\t";
+	}
+}
--- a/Classwork12/S12_3/S12_3.vcxproj
+++ b/Classwork12/S12_3/S12_3.vcxproj
@@ -0,0 +1,135 @@
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--- a/Classwork12/S12_3/S12_3.vcxproj.filters
+++ b/Classwork12/S12_3/S12_3.vcxproj.filters
@@ -0,0 +1,22 @@
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--- a/Classwork12/S12_4/S12_4.cpp
+++ b/Classwork12/S12_4/S12_4.cpp
@@ -0,0 +1,37 @@
+#include <iostream>
+using namespace std;
+double average(int(*p1)[4], int* p2)
+{
+	double sum = 0;
+	for (int i = 0; i < *p2; i++)
+		for (int j = 0; j < 4; j++)
+			sum += p1[i][j];
+	return sum / ((*p2) * 4);
+}
+int max(int(*p1)[4], int* p2)
+{
+	int max = 0;
+	for (int i = 0; i < *p2; i++)
+		for (int j = 0; j < 4; j++)
+			if (p1[i][j] > max)
+				max = p1[i][j];
+	return max;
+}
+int min(int(*p1)[4], int* p2)
+{
+	int min = 100;
+	for (int i = 0; i < *p2; i++)
+		for (int j = 0; j < 4; j++)
+			if (p1[i][j] < min)
+				min = p1[i][j];
+	return min;
+}
+int main()
+{
+	int a[3][4] = { {2,3,4,5},{12,13,14,15},{1,2,3,4} };
+	int r = 3;
+	cout << "ave=" << average(a, &r) << '\t';
+	cout << "max=" << max(a, &r) << '\t';
+	cout << "min=" << min(a, &r) << endl;
+	return 0;
+}
--- a/Classwork12/S12_4/S12_4.vcxproj
+++ b/Classwork12/S12_4/S12_4.vcxproj
@@ -0,0 +1,135 @@
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+      <Platform>Win32</Platform>
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+      <Platform>x64</Platform>
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+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
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--- a/Classwork12/S12_4/S12_4.vcxproj.filters
+++ b/Classwork12/S12_4/S12_4.vcxproj.filters
@@ -0,0 +1,22 @@
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--- a/Classwork12/实验报告.doc
+++ b/Classwork12/实验报告.doc