面向对象的程序设计第五次作业

#include <bits/stdc++.h>
using namespace std;
 
struct Point
{
    int x;
    int y;
};
 
void displayMenu() {
    for (int i = 0; i < 32; ++i)
        cout << "*";
    cout << endl;
    cout << "    1.Circle（圆）" << endl;
    cout << "    2.Rectangle（长方形）" << endl;
    cout << "    0.Exit（退出）" << endl;
    for (int i = 0; i < 32; ++i)
        cout << "*";
    cout << endl;
    cout << "Please select the shape:";
}
 
// void getTwoPoints(struct Point * P1, struct Point * P2) {
     
// }
 
// void printPoint(struct Point *) {
 
// }
 
void drawCircle(struct Point * P1, struct Point * P2) {
    if (P2 -> x - P1 -> x == P2 -> y - P1 -> y) {
        cout << "Draw a circle at center (" << (P1 -> x + P2 -> x) / 2 << "," << (P2 -> y + P1 -> y) / 2 << ")" << "with radius " << (P2 -> x - P1 -> x) / 2 << endl;
    }
    else {
        cout << "Not a circle, select again" << endl;
    }
 
}
 
void drawRectangle(struct Point * P1, struct Point * P2) {
    cout << "Draw a rectangle at toleft(" << P1 -> x << "," << P1 -> y << "), whose width is " <<  P2 -> x - P1 -> x << " and height is " << P2 -> y - P1 -> y << endl;
}
 
int main () {
    int choice;
    struct Point startP, endP;
    while (choice) {
        displayMenu();
        cin >> choice;
            switch (choice) {
        case 1:
            cout << "Please input the coordinate(x,y)of the start point:";
            cin >> startP.x >> startP.y;
            cout << "Please input the coordinate(x,y)of the end point:";
            cin >> endP.x >> endP.y;
            if (endP.x <= startP.x || endP.y <= startP.y){
                cout << "输入点的坐标存在问题,请重新输入！" << endl; 
                break;
            }
            //getTwoPoints(&startP, &endP);
            drawCircle(&startP, &endP);
            break;
        case 2:
            cout << "Please input the coordinate(x,y)of the start point:";
            cin >> startP.x >> startP.y;
            cout << "Please input the coordinate(x,y)of the end point:";
            cin >> endP.x >> endP.y;
            if (endP.x <= startP.x || endP.y <= startP.y){
                cout << "输入点的坐标存在问题,请重新输入！" << endl; 
                break;
            }
            //getTwoPoints(&startP, &endP);
            drawRectangle(&startP, &endP);
            break;
        case 0:
            cout << "Good Bye!
";
            break;
        default:
            cout << "Not supported! Please select again!
";
            break; 
        }
    }
    return 0;
}
// //测试样例
// 1
// 5 20
// 15 30
// 1
// 5 20
// 15 25
// 2
// 3 10
// 20 30
// 3
// 0

#include <bits/stdc++.h>

using namespace std;

struct Rule
{
    double money;
    double rate;
};

void showMenu() {
    cout << "请输入规则的条数：" << endl;;
}

double computeTax(struct Rule rules[], int n, double income) {
    double ans = 0;
    for (int i = n; i >= 1; i--) {
        if (income > rules[i].money) {
            ans += (income - rules[i].money) * rules[i].rate / 100;
            while (i - 1) {
                ans += (rules[i].money - rules[i - 1].money) * rules[i - 1].rate / 100;
                i--;
            }
            break;
        }
    }
    return ans;
}

int main () {
    showMenu();
    int N = 0;
    cin >> N;
    struct Rule rule[10];
    for (int i = 1; i <= N; ++i) {
        cout << "请输入第" << i << "条规则：";
        cin >> rule[i].money >> rule[i].rate;
    }

    double income;
    cout << "请输入您的收入：";
    cin >> income;
    while (income != -1) {
        cout << "您的收入是：" << income << ",";
        cout << "应缴所得税：" << fixed << setprecision(2) << computeTax(rule, N, income) << "元。";
        cout << endl;
        cout << "请输入您的收入：";
        cin >> income;
    }
    cout << "再见" << endl;
}
// 3
// 800 3
// 2000 4
// 5000 3
// 0
// 800
// 801
// 2000
// 1999
// 5000
// 10000
// -1