C++ 思维导图：全面整理编程核心知识

#include <iostream>

class BankAccount {
public:
    BankAccount(double initial_balance) : balance(initial_balance) {}
    void deposit(double amount) { balance += amount; }
    void withdraw(double amount) { balance -= amount; }
    double getBalance() { return balance; }

private:
    double balance;
};

int main() {
    // 创建一个银行账户对象 with with $1000 as initial balance
    BankAccount account(1000);

    // deposit $500
    account.deposit(500);

    // withdraw $200
    account.withdraw(200);

    // get balance
    double balance = account.getBalance();

    // print the final balance
    std::cout << "Final balance: $" << balance << std::endl;

    return 0;
}

#include <iostream>
#include <vector>

using namespace std;

void quickSort(vector<int>& nums, int low, int high) {
    if (low < high) {
        // partition
        int partitionIndex = partition(nums, low, high);

        // recursively sort the two halves
        quickSort(nums, low, partitionIndex - 1);
        quickSort(nums, partitionIndex + 1, high);
    }
}

int partition(vector<int>& nums, int low, int high) {
    // choose the pivot as the last element
    int pivot = nums[high];
    int i = low - 1;

    for (int j = low; j < high; j++) {
        if (nums[j] <= pivot) {
            i++;
            swap(nums[i], nums[j]);
        }
    }

    // place the pivot in its correct position
    swap(nums[i + 1], nums[high]);
    return i + 1;
}

int main() {
    vector<int> nums = {5, 2, 8, 3, 1, 7, 4, 6};

    quickSort(nums, 0, nums.size() - 1);

    // print the sorted array
    for (int num : nums) {
        cout << num << " ";
    }
    cout << endl;

    return 0;
}