diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-10.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-10.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..91092704d0b95d1e2be0c6e05b0b960aad039689
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-10.cpp"
@@ -0,0 +1,27 @@
+#include <iostream>
+double caculate(double a, double b,double (*ptr)(double,double));
+inline double add(double x, double y)
+{
+	std::cout << "add: ";
+	return x + y;
+}
+inline double sub(double x, double y)
+{
+	std::cout << "sub:  ";
+	return x - y;
+}
+int main() {
+	int x, y;
+	double(*pf[2]) (double, double) = { add,sub };
+	while (std::cin >> x >> y) {
+		double a1=caculate(x, y, pf[0]);
+		std::cout << a1 << std::endl;
+		double a2 = caculate(x, y, pf[1]);
+		std::cout << a2 << std::endl;
+	}
+	
+}
+double caculate(double a, double b, double(*ptr)(double, double))
+{
+	return (*ptr)(a, b);
+}
diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-3.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-3.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..a1612f8a210d0a169f0dddcedaa0a8be2251ef70
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-3.cpp"
@@ -0,0 +1,30 @@
+#include <iostream>
+using std::cout;
+using std::endl;
+struct box
+{
+	char maker[40];
+	float height;
+	float width;
+	float length;
+	float volume;
+};
+void show_box(const box b);
+void setVolume(box *b);
+int main() {
+	box testbox{ "testbox",10.0,20.0,30.0 };   //创建10*20*30的大小的箱子，未提供容量，默认为0.0
+	show_box(testbox);         //显示成员的值
+	setVolume(&testbox);       //设置volunme成员的值
+	show_box(testbox);         //重新显示成员的值
+	return 0;
+}
+
+void show_box(const box b)
+{
+	cout << b.maker << " " << b.height << " " << b.width << " " << b.length << " " << b.volume << endl;
+}
+
+void setVolume(box * b)
+{
+	b->volume = b->height*b->length*b->width;
+}
diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-6.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-6.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..b342278d24a81ce699f404d25ad5da73874970b4
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter7/7-6.cpp"
@@ -0,0 +1,48 @@
+#include <iostream>
+using std::cout;
+using std::cin;
+using std::endl;
+int Fill_array(double arr[],int length);
+void Show_array(const double arr[], int length);
+void Reverse_array(double arr[], int length);
+const int MAXSIZE = 10;
+
+int main()
+{
+	double test[MAXSIZE];
+	int Len=Fill_array(test, 5);
+	Show_array(test, Len);
+	Reverse_array(test, Len);
+	Show_array(test, Len);
+}
+int Fill_array(double arr[], int length)
+{
+	cout << "please input double value" << endl;
+	double v;
+	int index = 0;
+	while (length--&&cin>>v) {
+		arr[index++] = v;
+	}
+	return index ;
+}
+
+void Show_array(const double arr[], int length)
+{
+	cout << "the array is:" << endl;
+	for (int i = 0; i < length; i++)
+		cout << arr[i] << " ";
+	cout << endl;
+}
+
+void Reverse_array(double arr[], int length)
+{
+	cout << "Reverse the array!" << endl;
+	int l = 0, r = length - 1;
+	while (l < r) {
+		double tmp = arr[l];
+		arr[l] = arr[r];
+		arr[r] = tmp;
+		l++;
+		r--;
+	}
+}
diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-1.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-1.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..f645e09670b75ed9f2c9860e67d3e84a740c8e38
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-1.cpp"
@@ -0,0 +1,25 @@
+#include <iostream>
+using std::cout;
+using std::endl;
+using std::cin;
+void print_str(char *s, int i = 0);
+
+void print_str(char * s, int i)
+{
+	static int total = 0;
+	total++;
+	if (i == 0) {
+		cout << s;
+	}
+	else {
+		for (int j = 0; j < total; j++)
+			cout << s << endl;
+	}
+}
+int main() {
+	char str[6] = "abced";
+	int i;
+	while (cin >> i) {
+		print_str(str, i);
+	}
+}
diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-5.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-5.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..b7cc2f993ef5ff28a03a8aee4fd999f682c4cafa
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-5.cpp"
@@ -0,0 +1,25 @@
+#include <iostream>
+using std::cout;
+using std::endl;
+using std::cin;
+template <typename T>
+T Maxvalue(const T *arr);
+int main()
+{
+	int arr1[5] = { 5,4,3,2,1 };
+	double arr2[5] = { 5.5,4.4,3.3,2.2,1.1 };
+	cout << "Max of int array: ";
+	cout << Maxvalue(arr1) << endl;
+	cout << "Max of double array: ";
+	cout << Maxvalue(arr2) << endl;
+}
+
+template<typename T>
+T Maxvalue(const T * arr)
+{
+	T ans = arr[0];
+	for (int i = 1; i < 5; i++) {
+		ans = ans > arr[i] ? ans : arr[i];
+	}
+	return ans;
+}
diff --git "a/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-6.cpp" "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-6.cpp"
new file mode 100644
index 0000000000000000000000000000000000000000..9d183c6a46636f28da3baf47842ca5dbba50b748
--- /dev/null
+++ "b/C++/codes/2024-07/\346\235\216\345\255\220\350\266\205/C++PrimerPlus\350\257\276\345\220\216\344\271\240\351\242\230/Chapter8/8-6.cpp"
@@ -0,0 +1,44 @@
+#include <iostream>
+#include <cstring>
+using std::cout;
+using std::endl;
+using std::cin;
+const char* maxn(const char* arr[], size_t n);
+template <typename T>
+T maxn(const T *arr, size_t n);
+
+int main()
+{
+	int arr1[6] = { 1,5,3,7,9,13};
+	double arr2[4] = { 5.3,10.3,20.4,1.1 };
+	const char *str[5] = { "abc","df","gfaga","fa","n"};
+
+	cout << "Max of int array: ";
+	cout << maxn(arr1,6) << endl;
+	cout << "Max of double array: ";
+	cout << maxn(arr2,4) << endl;
+	cout << "longest of str array: ";
+	cout << maxn(str, 5) << endl;
+
+}
+template<typename T>
+T maxn(const T * arr, size_t n)
+{
+	T ans = arr[0];
+	for (size_t i = 1; i < n; i++) {
+		ans = ans > arr[i] ? ans : arr[i];
+	}
+	return ans;
+}
+
+
+const char* maxn(const char* arr[], size_t n) {
+	const char* maxStr = arr[0];
+	for (size_t i = 1; i < n; ++i) {
+		if (strlen(arr[i]) > strlen(maxStr)) {
+			maxStr = arr[i];
+		}
+	}
+	return maxStr;
+}
+