（终稿）C++实现科学计算器主函数代码（含调用函数）

代码仅供作业小组人员使用

（非完成版）C++实现科学计算器主函数代码，（不含调用函数）_克蕾尔的博客-CSDN博客

（初稿）C++实现科学计算器主函数代码（含调用函数）_Honeyseaaa的博客-CSDN博客

#include
#include
#include 
using namespace std;

int key1() {                                                            //三角函数预处理
    int k1;
    cout << "请问是否需要对该数字进行预处理,如不需要请输入0：" << endl;
    cout << "1.sin  2.cos  3.tan " << endl;
    cin >> k1;
    while (k1 != 1 && k1 != 2 && k1 != 3 && k1 != 0) {
        cout << "请重新输入" << endl;
        cin >> k1;
    }
    switch (k1) {
        case 1:
            return 1;
            break;
        case 2:
            return 2;
            break;
        case 3:
            return 3;
            break;
        default:
            return 0;
            break;
        }
}

void key2(double* cal, int a) {
    double c = *cal;
    switch (a) {//所有涉及cal的都用c来表示
    case 1:
        c = sin(c);//sinc
        break;
    case 2:
        c = cos(c);//cosc
        break;
    case 3:
        c = tan(c);//tanc
        break;
    case 0:
        c = c;
        break;
    }
    *cal = c;
}

int keys(double* cal) {
    int b1;
    double b2, c;
    c = *cal;
    cout << "请输入您所需要的运算符或运算方式前的编号，其中第8个是结束运算：" << endl;
    cout << "************************************" << endl;
    cout << "*   1. ＋   2. —   3. ×   4. ÷  *" << endl;
    cout << "*   5.n√   6. ^n   7.1/X   8. FIN *" << endl;
    cout << "************************************" << endl;
    cin >> b1;
    while (b1 != 1 && b1 != 2 && b1 != 3 && b1 != 4 && b1 != 5 && b1 != 6 && b1 != 7 && b1 != 8) {
        cout << "请重新输入" << endl;
        cin >> b1;
    }
    int a = key1();
    cout << "请输入下一个数,如果您已经结束运算请随意输入数字" << endl;
    cin >> b2;
    key2(&b2, a);
    while (b1 != 8) {
        switch (b1) {
        case 1:
            c += b2;
            break;
        case 2:
            c -= b2;
            break;
        case 3:
            c *= b2;
            break;
        case 4:
            c /= b2;
            break;
        case 5:
            c = pow(c, 1 / b2);
            break;
        case 6:
            c = pow(c, b2);
            break;
        case 7:
            c = b2 / c;
            break;
        default:
            break;
        }
        *cal = c;
        return 0;
    }
    if (b1 == 8) {
        *cal = c;
        return 1;
    }
}

int Narcissus(int n) {                                                  //判断水仙花数
    int a, b, c, m;
    a = n / 100;
    b = (n % 100) / 10;
    c = n % 10;
    m = a * a * a + b * b * b + c * c * c;
    if (n == m)
        cout << n << "是水仙花数" << endl;
    else
        cout << n << "不是水仙花数" << endl;
    return 0;
}

int Divisor(int a, int b) {                                             //计算最大公因数
    int x=0;
    cout<<"请输入您想要判断的第一个数："<>a;
    cout<<"请输入您想要判断的第二个数："<>b;
    for (x = a; x >= 1; x--) {
        if (a % x == 0 && b % x == 0)
        {
            cout <>a;
    cout<<"请输入您想要判断的第二个数："<>b;
    for (y = a; y <= a * b; y++) {
        if (y % a == 0 && y % b == 0)
        {
            cout <> a;
    int n=0, m=0;
    switch (a) {
    case 1:
        cout<<"请输入您想要判断的数字（3位数）：";
        cin >> n;
        Narcissus(n);
        break;
    case 2:
        Divisor(n, m);
        break;
    case 3:
        Multiple(n, m);
        break;
    case 4:
        bool isFlag;
        cout<<"请输入您想要判断的数字：";
        cin>>n;
        isFlag = isPrime(n);
        if (isFlag) {
            cout << n << "是素数" << endl;
        }
        else {
            cout << n << "不是素数" << endl;
        }
        break;
    case 5:
            long long n;
            long long result = 1;
            cin >> n;
            for (int i = 1; i <= n; i++) {
                result *= i;
            }
            cout << n << "的阶乘为" << n << "!=" << result << endl;
        break;
    }
}


void calculation() {                                                    //计算
    double cal = 0;
    int a = key1();
    cout << "请输入数字：" << endl;
    cin >> cal;
    key2(&cal, a);
    int n = 0;
    while (n == 0) {
        n = keys(&cal);
    }
    cout << cal << endl;

}

int main() {                                                            //工具or计算
    while(1){
    int a1 = 0;
    cout << "欢迎使用科学计算器！请选择您需要的功能" << endl;
    cout << "1.工具" << endl;
    cout << "2.计算" << endl;
    cin >> a1;
    while (a1 != 1 && a1 != 2) {
        cout << "请重新输入" << endl;
        cin >> a1;
    }
    if (a1 == 1) {
        tools();
    }
    else if (a1 == 2) {
        calculation();
    }
    }
}