C++信息学奥赛一本通-第一部分-基础一-第3章-第2节

关注

原创 2025-08-19 13:01:07 295 阅读 AI 写同款· GEO 优化 ›

信息学奥赛一本通（C++版） 信息学奥赛一本通（C++版）总目录 1.信息学奥赛一本通（C++版）刷题记录 2.信息学奥赛一本通（C++版）第一部分 C++语言第一章 C++语言入门 3.信息学奥赛一本通（C++版）第一部分 C++语言第二章顺序结构程序设计 4.信息学奥赛一本通（C++版）第一部分 C++语言第三章程序的控制结构 5.信息学奥赛一本通（C++版）第一部分 C++语言第... 阅读详情

C++信息学奥赛一本通-第一部分-基础一-第3章-第2节

2057 星期几

#include <iostream>

using namespace std;

int main() {
    int day; cin >> day;
    
    switch (day) {
        case 1:
            cout << "Monday";
            break;
        case 2:
            cout << "Tuesday";
            break;
        case 3:
            cout << "Wednesday";
            break;
        case 4:
            cout << "Thursday";
            break;
        case 5:
            cout << "Friday";
            break;
        case 6:
            cout << "Saturday";
            break;
        case 7:
            cout << "Sunday";
            break;
        default:
            cout << "input error!";
            break;
    }
    return 0;
}

2058 简单计算器

    #include <iostream>

    using namespace std;

    int main() {
        double num1, num2; char op; cin >> num1 >> num2 >> op;
        if (op == '/' && num2 == 0) printf("Divided by zero!");
        else {
            switch (op) {
                case '+':
                    cout << num1 + num2;
                    break;
                case '-':
                    cout << num1 - num2;
                    break;
                case '*':
                    cout << num1 * num2;
                    break;
                case '/':
                    cout << num1 / num2;
                    break;
                default:
                    cout << "Invalid operator!";
                    break;
            }
        }
    }

2059 买笔

#include <iostream>

using namespace std;

int main() {
        int price; cin >> price;
        int result = price % 4;
        if (price < 4) cout << "0 0 0";
        else{
            switch (result) {
                case 0 :
                    cout <<  0 << " " << 0 << " "<< price / 4;
                    break;
                case 1 :
                    cout << 0 << " " << 1 << " " << price / 4 - 1;
                    break;
                case 2:
                case 3:
                    cout << 1 << " " << 0 << " " << price / 4 - 1;
                    break;
            }
        }
}

1049 晶晶赴约会

#include <iostream>

using namespace std;

int main() {
    int day; cin >> day;
    switch (day) {
        case 1:
        case 3:
        case 5:
            cout << "NO";
            break;
        default:
            cout << "YES";
            break;
    }
}

1050 骑车与走路

#include <iostream>

using namespace std;

int main() {
    double distance; cin >> distance;
    double time_of_bike = distance / 3.0  + 50.0;
    double time_of_walk = distance / 1.2;

    if (time_of_bike < time_of_walk) cout << "Bike";
    else if (time_of_bike > time_of_walk) cout << "Walk";
    else cout << "All";

}

1051 分段函数

#include <iostream>
using namespace std;

int main() {
    double x; cin >> x;
    if (x >= 0 && x < 5) {
        printf("%.3f", 2.5 - x);
    } else if (x >= 5 && x < 10) {
        printf("%.3f", 2 - 1.5 * (x - 3) * (x-3));
    } else {
        printf("%.3f", x / 2 - 1.5);
    }
}

1052 计算邮资

#include <cmath>
#include <iostream>

using namespace std;

int main() {
    double weight; char way; cin >> weight >> way;
    int result = 8;

    if (weight > 1000)
        result += ceil((weight - 1000) / 500.0) * 4;


    if (way == 'y') result += 5;
    cout << result;
}

1053 最大数输出

#include <iostream>
#include <algorithm>

using namespace std;

int main() {
    int nums[3]; cin >> nums[0] >> nums[1] >> nums[2]; 
    sort(nums, nums + 3);
    cout << nums[2] << " " << nums[1] << " " << nums[0] << endl;
}

1054 三角形判断

#include <iostream>
using namespace std;
int main() {
    int a, b, c; cin >> a >> b >> c;
    if (a + b > c && a + c > b && b + c > a) cout << "yes";
    else cout << "no";
}

1055 判断闰年

#include <iostream>
using namespace std;
int main() {
    int year; cin >> year;
    if (year % 400 == 0 || year % 100 != 0 && year % 4 == 0) cout << "Y";
    else cout << "N";
}

1056 点和正方形的关系

#include <iostream>
using namespace std;
int main() {
    int x, y; cin >> x >> y;
    if (abs(x) <= 1 && abs(y) <=1) cout << "yes";
    else cout << "no";
}

1057 简单计算器

    #include <iostream>

using namespace std;

int main() {
    int num1, num2; char op; cin >> num1 >> num2 >> op;
    if (op == '/' && num2 == 0) printf("Divided by zero!");
    else {
        switch (op) {
            case '+':
                cout << num1 + num2;
                break;
            case '-':
                cout << num1 - num2;
                break;
            case '*':
                cout << num1 * num2;
                break;
            case '/':
                cout << num1 / num2;
                break;
            default:
                cout << "Invalid operator!";
                break;
        }
    }
}

1058 求一元二次方程

#include <cmath>
#include <iostream>

using namespace std;

int main() {
    double a, b, c; cin >> a >> b >> c;
    double delta = pow(b, 2) - 4 * a * c;
    if (delta > 0 ) {
        double x1 = (pow(delta, 0.5) - b) / (2 * a);
        double x2 = (-pow(delta, 0.5) - b) / (2 * a);
        printf("x1=%.5f;x2=%.5f", min(x1, x2), max(x1,x2));
    } else if (delta == 0 ) {
        printf("x1=x2=%.5f",(pow(delta, 0.5) - b) / (2 * a));
    }
    else cout << "No answer!";
}

收录于