如何直接在Android设备上以可执行文件的形式运行简单的c ++程序？

Question

我使用Windows（10-64位）PC中的代码块用c ++语言编写了一种非常简单的程序。 该代码由GCC编译器编译，并生成了* .exe格式的可执行文件。 现在，我想在我的android设备或任何其他android设备上运行该二进制版本或说可执行文件，但是，我找不到直接执行此操作的方法。 我的Android设备中有两个应用程序，可以帮助我编写代码，编译和运行/测试它。 首先是CPPDroid ，另一个是Decoder 。 我可以使用这些应用程序将我的代码复制到其中一个程序中，然后编译代码然后运行它，但是此过程似乎非常大且冒险。 在编辑器中复制或打开整个代码是有风险的，因为由于Android设备的触摸屏较小，我可能会在不知不觉中编辑或修改代码。

我已经尝试在Internet上搜索解决我的问题的方法，但是找不到。 是的，有一些答案可以解决此问题，并尝试解决这些问题，但是它们要么很难理解，要么无益。 我是新手，对使用android studio制作应用程序了解得不多。

这是我的代码：

#include<bits/stdc++.h>
#include<conio.h>
#define EPSILON 0.00001

using namespace std;

class Bisection
{
    int noofcaparr, *coeffarr, *powerarr, eqn;
    double var_x, result, var_a, var_b, var_c;
    char *eqnprnt;

    public:


        Bisection()
        {
            int noofcaparr = 0;
        }
        Bisection(const Bisection &obj)
        {
            this->noofcaparr = obj.noofcaparr;
            this->coeffarr = obj.coeffarr;
            this->powerarr = obj.powerarr;
            this->eqn = obj.eqn;
            this->var_x = obj.var_x;
            //this->result = obj.result;
            //this->var_a = obj.var_a;
            this->var_b = obj.var_b;
            this->var_c = obj.var_c;
            this->eqnprnt = obj.eqnprnt;
        }

        void geteqn();
        void showeqn();
        double setupeqn();
        void showresult();
        void getvariable();
        double roundoff(double &);
        Bisection bsmethodcomputn(Bisection &);

};

void Bisection::getvariable()
{
    this->var_a = 0;
    cout<<"\n\n\n\t ENTER THE VALUE OF VARIABLE:  ";
    cin>>this->var_a;
}

void Bisection::geteqn()
{
    int c, i, n;
    system("cls");
    cout<<"\n\n\t\t How many terms do you have in your equation? ";
    cout<<"\n\t For Example:  x^3 - 4x - 9 = 0   , has '3' terms     and ";
    cout<<"\n\t               x^4 + x^3 - 7x^2 - x + 5 = 0   , has '5' terms";
    cout<<"\n\t Enter the number of terms present in your equation:  ";
    cin>>this->noofcaparr;
    n = this->noofcaparr-1;

    this->coeffarr =  new int[n];
    this->powerarr = new int[n];

    for(i=0, c=1; i<=n; i++, c++ )
    {
        cout<<endl<<endl<<"\t\t Please enter the "<<c<<" th/st/nd/rd highest degree of x:  ";
        cin>>this->powerarr[i];

        cout<<endl<<endl<<"\t\t Please enter the coefficient of "<<c<<" th/st/nd/rd highest degree of x (with sign -/+):  ";
        cin>>this->coeffarr[i];
    }
/*    cout<<"\n\n\n\t\t Enter the value of x:  ";
    cin>>this->var_a; */
    cout<<endl<<endl<<"\n\n\t Values Set!";
    getch();


}


void Bisection::showeqn()
{
    int i, n;
    n = this->noofcaparr-1;
    system("cls");
    cout<<endl<<endl<<"\t\t Your equation is:   ";

        for(i=0; i<=n; i++ )
        {

            if(this->powerarr[i]==0)
            {
                if(i==0)
                {
                    if(this->coeffarr[i]>= 0)
                    {
                        if(this->coeffarr[i]==0)
                        {
                            cout<<" +0 ";
                        }

                        else
                        {
                            if(this->coeffarr[i]==1)
                            {
                                cout<<" 1";
                            }

                            else
                            {
                                cout<<" "<<(this->coeffarr[i])<<" ";
                            }
                        }
                    }
                    else
                    {
                        if(this->coeffarr[i]== -1)
                        {
                            cout<<" -"<<"1";
                        }
                        else
                        {
                            cout<<" "<<(this->coeffarr[i])<<" ";
                        }
                    }
                }
                else
                {
                    if(this->coeffarr[i]>= 0)
                    {
                        if(this->coeffarr[i]==0)
                            cout<<" +0 ";

                        else
                            cout<<" +"<<(this->coeffarr[i])<<" ";
                    }
                    else
                    {
                        cout<<" "<<(this->coeffarr[i])<<" ";
                    }
                }
            }

            else
            {
                if(this->powerarr[i]==1)
                {
                    if(i==0)
                    {
                        if(this->coeffarr[i]>= 0)
                        {
                            if(this->coeffarr[i]==0)
                            {
                                cout<<" +0 ";
                            }
                            else
                            {
                                if(this->coeffarr[i]==1)
                                {
                                    cout<<"x";
                                }
                                else
                                {
                                    cout<<" +"<<(this->coeffarr[i])<<"x";
                                }
                            }
                        }
                        else
                        {
                            if(this->coeffarr[i]== -1)
                            {
                                cout<<" -"<<"x ";
                            }
                            else
                            {
                                cout<<(this->coeffarr[i])<<"x";
                            }
                        }
                    }
                    else
                    {
                        if(this->coeffarr[i]>= 0)
                        {
                            cout<<"+"<<(this->coeffarr[i])<<"x";
                        }
                        else
                        {
                            cout<<(this->coeffarr[i])<<"x";
                        }
                    }
                }
                else
                {
                    if(i==0)
                    {
                        if(this->coeffarr[i]>= 0)
                        {
                            if(this->coeffarr[i]==1)
                            {
                                cout<<"x^"<<this->powerarr[i]<<"  ";
                            }
                            else
                            {
                                if(this->coeffarr[i]==0)
                                {
                                    cout<<" +0 ";
                                }
                                else
                                {
                                    cout<<" "<<(this->coeffarr[i])<<" "<<"x^"<<this->powerarr[i]<<"  ";
                                }
                            }

                        }
                        else
                        {
                            if(this->coeffarr[i]== -1)
                            {
                                cout<<" -"<<"x^"<<this->powerarr[i]<<"  ";
                            }
                            else
                            {
                                cout<<" "<<(this->coeffarr[i])<<" "<<"x^"<<this->powerarr[i]<<"  ";
                            }
                        }
                    }
                    else
                    {
                        if(this->coeffarr[i]>= 0)
                        {
                            cout<<" +"<<(this->coeffarr[i])<<" "<<"x^"<<this->powerarr[i]<<"  ";
                        }
                        else
                        {
                            cout<<" "<<(this->coeffarr[i])<<" "<<"x^"<<this->powerarr[i]<<"  ";
                        }
                    }
                }
            }
        }
    cout<<" = 0  = f(x) {let}";
}

double Bisection::setupeqn()
{
    this->result = 0;
    double rslt, rndoff_res;
    rslt = this->result;
    int n = this->noofcaparr - 1;
    for (int i=0; i <= n; i++)
    {
        double pwr, cfr;
        double x;
        x = this->var_a;
        pwr= this->powerarr[i];
        cfr = this->coeffarr[i];
        rslt += (pow(x,pwr)*cfr);
        rndoff_res = this->roundoff(rslt);
        rslt = rndoff_res;
        //cout<<endl<<endl<<endl<<"\t Value of var_a: "<<x;
        //cout<<endl<<endl<<endl<<"\t Value of powerarr: "<<pwr;
        //cout<<endl<<endl<<endl<<"\t Value of coeffarr: "<<cfr;
        //cout<<"\n\n\t result +=  (pow(this->var_a, this->powerarr[i])* this->coeffarr[i]) = "<<rslt;
        this->result= rslt;
    }


    //cout<<endl<<endl<<endl<<"\t Value of result: "<<rslt;
    return (this->result);
}

void Bisection::showresult()
{

    cout<<endl<<endl<<"\t\t This is your result:  "<<this->result;

}

double Bisection::roundoff(double &res)
{
    // 37.66666 * 100 =3766.66
    // 3766.66 + .5 =37.6716    for rounding off value
    // then type cast to int so value is 3766
    // then divided by 100 so the value converted into 37.66
    ///double round_off_result = (int)(res * 100000 + .5);
    ///return (double)round_off_result / 100000;
    double round_off_result = res;
    setprecision(4);
    return round_off_result;
}

Bisection Bisection::bsmethodcomputn(Bisection &obj)
{
    double temp_c;
    Bisection obj2 = *this;

    cout<<"\n\n\t First value is = "<<this->result<<"\t\t Second value is = "<<obj.result;
    cout<<endl<<endl<<endl;
    //void bisection(double a, double b)

        if (this->result * obj.result >= 0)
        {

            cout << "\t \t You have not assumed right a and b\n";

            cout<<"\n\n\t First value is = "<<this->var_a<<"\t\t Second value is = "<<obj.var_a;
            //return;
        }



        else
        {

            cout<<"\n\n\t First value is = "<<this->var_a<<"\t\t Second value is = "<<obj.var_a;
            double a = this->var_a;
            double b = obj.var_a;
            //Bisection obj2 = *this ;

            obj2.var_a = a;
            obj2.setupeqn();
            double c = obj2.var_a;
            int counter = 1;

            while ((b-a) >= EPSILON)
            {
                // Find middle point
                temp_c = c;
                c = (a+b)/2;
                //c = obj2.roundoff(c);
                obj2.var_a = c;

                cout<<endl<<endl<<endl<<"\n\t\t\t\t "<<counter<<").";
                cout<<endl<<endl<<endl<<"\t Value of c: "<<obj2.var_a;


                obj2.setupeqn();

                cout<<endl<<endl<<endl<<"\t Value of result:  "<<obj2.result;

                // Check if middle point is root
                if (obj2.result == 0.0001)
                    break;

                else
                {
                    if(temp_c==c)
                        break;
                // Decide the side to repeat the steps
                    else
                    {
                        if (obj2.result* this->result < 0)
                        {
                            b = c;
                        }
                        else
                            a = c;
                    }
                }

                counter++;
            }

            cout << "\n\n\n\n\t\t\t\t *** The value of root is : " << c<<" ***"<<endl<<endl<<endl;
            getch();

        }

}

int main()
{
    Bisection a;

    a.geteqn();
    a.showeqn();

    char choice;

    do
    {
    a.getvariable();
    a.setupeqn();
    a.showresult();
    Bisection b = a;
    b.getvariable();
    b.setupeqn();
    b.showresult();

    a.bsmethodcomputn(b);

    cout<<"\n\n\n\t Do you want to continue? (Y/N)";
    cin>>choice;
    }while(choice=='Y'||choice=='y');
    getch();
    return(0);
}

我有该程序的Windows可执行文件，但我不知道如何在Android设备上直接运行该程序。

我实际上创建了此程序以与同学共享，以便他们可以检查自己的解决方案是否正确。 他们不是程序员，他们不知道如何编写，编译或运行程序。 因此，他们无法执行cppdroid或解码器过程。 我也不想给他们我的代码。 但是，我想与他们共享此程序，以便他们可以成功使用它。 现在我无法理解如何实现它。 该程序非常简单，它需要一些输入，经过计算后，它会提供所需的输出，仅此而已。 它不是很复杂的程序。 我希望将有任何可行的方法来完成此任务。

Answer 1

EXE是Windows可执行文件。 可执行文件是与操作系统绑定的二进制文件，并且在操作系统之间不兼容。 您需要针对ARM（或ARM64）进行构建，即使如此，Android中的控制台应用程序也需要外壳程序访问，因此不容易安装或运行。 如果您将其提供给某人，请完全忘记他们将能够在外壳中运行它（或者您可能以为它会自动呈现为GUI应用程序，事实并非如此）。

如果您对Android感兴趣，则应该获得一本不错的Android书籍，并详细了解可用的API等。

Android，iOS，Linux，Windows是不同的生态系统，并且它们之间的编程存在显着差异。

这些设备不能在线进行Android或iOS开发，您需要适当的IDE。 对于Windows，有Android Studio 。 对于iOS，您需要Mac和Xcode 。

简而言之，通过大量的阅读，学习曲线，投资和调试，您目前远未达到人们想要达到的目标。

取得一本不错的C ++书 （从bits/stdc++ include和当前书中using namespace std判断不好），然后开始学习Android，Windows，iOS等设备上的API及其所需的语言（Java， Objective-C，Swift，Kotlin等。 这将花费数年时间 ，但是像大多数坏书一样试图欺骗自己是没有意义的。