c++ - 为什么我的程序不能在GDB在线编译器/调试器或Visual Studio C++ 2019中运行？

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我刚刚完成编写此代码，并准备开始调试和测试。但是，当我尝试在GDB中运行它时，控制台仍然空白。将其放置五分钟后，控制台中的代码下方无任何显示(无错误或程序文本)。我缺少什么导致程序无法通过编译器运行？感谢您的任何帮助，下面包括每个功能/行应该执行的代码和描述。

// This program is able to generate a random number to be doubled, digits reversed, raise to 2 3 and 4 power, sum the digits,
// if two digit raise first digit to second power, and if three digits and the last digit is <= 4 then raise the first two digitss to the power of the last digit.
// In addition if after an operation is performed the number is < 10, 10 will be added to the number, the number will be checked for prime and each successive
// operation will use the most recent number generated.

//This is for Week 6 Assignment CS265

//These three lines initialize the required predefined functions to run the program.
#include <iostream>
#include <stdlib.h>
#include <time.h>

//This sets the namespace for the entire program to std.
using namespace std;

//This function doubles the current number.
int doub(int d)

{
    //This creates a variable to store the doubled number.
    int duo;

    //This doubles the number.
    duo = (d*2);

    //This returns the value for the doubled number for use in output.
    return duo;

}

//This function reverses the digits of the current number.
int reverse(int r)

{
    //This creates a variable to store the reversed number.
    int revnum = 0;

    //This while loop runs to split the digits of the number.
    while (r > 0)
    {
        //This reverses the number.
        revnum = revnum*10 + r%10;

        //This specifies the digit order of the number.
        r = r/10;

    }

    //This returns the reversed number for use in output.
    return revnum;

}

//This function raises the number by user selected power.
int power(int p)

{
    //This creates a variable to store the number post operations.
    int powe = 0;

    //This creates a variable for the power to raise by.
    int rais;

    //This explains to the user to enter the power to raise by out of 2, 3, 4.
    cout << "Welcome to Power Raiser." << endl;
    cout << "Please enter the power to raise by: 2, 3, or 4." << endl;

    //This stores the user input for the power to raise by.
    cin >> rais;

    //This if statement raises the number to the second power if 2 is entered by the user.
    if (rais == 2)
    {
        powe = (p^2);

    }

    //This if statement raises the number to the third power if 3 is entered by the user.
    if (rais == 3)
    {
        powe = (p^3);

    }

    //This if statement raises the number to the fourth power if 4 is entered by the user.
    if (rais == 4)
    {
        powe = (p^4);

    }

    //This closes the program if anything other than 2, 3, 4 is entered by the user.
    else
    {
        //These lines explain the error.
        cout << "Input Error" << endl;
        cout << "You entered: " << rais << endl;
        cout << "Cannot raise to this power currently." << endl;
        cout << "Exiting Program" << endl;
        cout << ". . . . . . . ." << endl;

        //These two lines exit the program.
        exit(18);
        return(18);
    }

    //This returns the number raised to the selected power for use in output.
    return powe;

}

//This function takes the sum of the digits of the number.
int sum(int s)

{
    //This creates a variable to store the sum.
    int su = 0;

    //This creates a loop control variable.
    int n = 0;

    //This sets the LCV to equal the number.
    n = s;

    //This while loop sums the digits of the number.
    while (n != 0)
    {
        //These two lines perform the operations required to sum the digits of the number.
        su = (su + n % 10);
        n = n/10;

    }

    //This line returns the sum of the number for use in output.
    return su;

}

//This function raises the first digit of the number by the second.
int twodigit(int two)

{
    //These two lines create variables for the first and second digit of the number.
    int d_one;
    int d_two;

    //This creates a variable to store the result from the operations.
    int dig;

    //These two lines split the number into the first and second digits.
    d_one = (two / 10);
    d_two = (two % 10);

    //This raises the first digit to the power of the second digit.
    dig = (d_one ^ d_two);

    //This returns the answer from the operations to be used in output.
    return dig;

}

//This function raises the first two digits of the number by the third digit if the third digit is less than 4.
int threedigit(int three)

{
    //These three lines create variables for the three digits in the number.
    int di_one;
    int di_two;
    int di_three;

    //These three lines specify which digit of the number is first, second, and third.
    di_one = (three / 100 % 10);
    di_two = (three / 10 % 10);
    di_three = (three % 10);

    //This loop raises the first two digits to the power of the third digit.
    while (three >= 100)
    {
        //This if statement checks if the third digit is less than or equal to 4.
        if (di_three <= 4)
        {
            //This creates a variable to store the result of the operation.
            int di_four;

            //This raises the first two digits to the power of the third digit.
            di_four = ( ((di_one * 100) + (di_two * 10)) ^ di_three );

            //This returns the result for use in output.
            return di_four;
        }

        //This else statement runs when the third digit in the number is greater than 4.
        else
        {
            //These two lines explain the error.
            cout << "The number's third digit is greater than 4." << endl;
            cout << "Cannot perform the requested operation." << endl;

            //This line restarts the program.
            return(0);
        }
    }
}

//This function checks if the current number is prime.
int prime(int pri)

{
    //These two lines create the LCV and a place to store if the number is prime.
    int v;
    int prim;

    //This for loop checks if the number is prime.
    for (v = 2; v <= pri; v++)
    {
        //This if statement stores if the number is prime.
        if (pri % v == 0)
        {
            prim = 1;
        }
    }

    //This if statement outputs if the number is prime.
    if (prim == 1)
    {
        cout << "The number is Prime" << endl;
    }

    //This statement outputs if the number is not prime.
    if (prim != 1)
    {
        cout << "The number is not Prime" << endl;
    }
}

//This function checks if the current number is less than ten.
int lessten(int l)

{
    //This creates a variable to store the number plus ten.
    int plusten = 0;

    //This if statement checks if the number is less than 10.
    if (l < 10)
    {
        //These two lines explain the number is less than 10 and that 10 will be added to the number.
        cout << "The number post operation is less than 10." << endl;
        cout << "Adding 10 to the number." << endl;

        //This adds 10 to the number.
        plusten = (l + 10);

        //This returns the number plus ten for use in output.
        return plusten;

        //This tells the user what the number plus ten is.
        cout << "The number plus 10 is: " << plusten << endl;
    }

    //This else statement handles if the number is greater than 10.
    else
    {
        //This tells the user the number is greater than 10.
        cout << "The number is greater than 10" << endl;

        //This returns the number for use in output.
        return l;

    }
}

//This function is used to exit the program.
int quit()

{
    //These two lines explain that the program is closing.
    cout << "Exiting Program" << endl;
    cout << ". . . . . . . ." << endl;

    //These two lines exit the program.
    exit(1);
    return(1);
}

//This function generates random numbers between 1 and 99
int randomgen()

{
    //This creates a variable to store the random number.
    int ran;

    //This creates a LCV for the do loop below and sets it equal to 0.
    int y = 0;

    //This do loop generates the random number.
    do
    {
        //This generates a random time seed.
        srand(time(0));

        //This generates a random number between 1 and 99.
        ran = rand() % 100;

        //This while controls the do loop.
    }while (y != 9);

    //This returns the random number for use in the rest of the program.
    return ran;
}

//This starts the main program.
int main()

{
    //This creates a variable to control which number is used as the current.
    int z = 1;

    //This creates a LCV for the do loop below.
    int x = 0;

    //This creates the variable for user menu selection.
    int menu;

    //This do loop controls the menu function of the program.
    do 
    {
        //These four lines create variables for the random number, the number after operations, and the current number.
        int randnum;
        int stored;
        int num;


        //This makes the program only create a random number the first pass through the loop.
        if (z < 2)
        {
            //This runs the random number generator function.
            return randomgen();

            //This sets the result of the function as the random number.
            randnum = randomgen();

            //This sets the random number to the current number.
            num = randnum;
        }

        //This makes the program perform operations on the most recent number after operations are performed.
        else
        {
            //This sets the current number equal to the result of the operations performed.
            num = stored;
        }

        //These three lines explain what the program does.
        cout << "Welcome to Random Number Opertor." << endl;
        cout << "This program allows for multiple opertions to be performed on a randomly generated number." << endl;
        cout << "Once an operation has been performed, any addition operation will be performed on the number from the last operation." << endl;

        //These eight lines provide the menu options to navigate the program.
        cout << "====================== Menu ======================" << endl;
        cout << "1. Double the Number" << endl;
        cout << "2. Reverse the Digits" << endl;
        cout << "3. Raise the Number by the 2, 3, or 4 Power" << endl;
        cout << "4. Sum the Digits" << endl;
        cout << "5. Raise First Digit by Second Digit(2-Digit Numbers Only)" << endl;
        cout << "6. Raise First two Digits by Third Digit if it is less than 4 (3-Digit Numbers Only)" << endl;
        cout << "7. Exit" << endl;

        //This tells the user the current number.
        cout << "The current number is " << num << endl;

        //These two lines ask for a menu selection and store the answer in the menu variable.
        cout << "Please pick an operation from the menu" << endl;
        cin >> menu;

        //This if statement runs if the user selects menu option 1.
        if (menu == 1)
        {
            //This passes the current number through the doubling function.
            return doub(num);

            //This sets the current number to the result of doubling.
            num = doub(num);

            //This tells the user the result of the operation.
            cout << "The number doubled is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the current number through the prime number checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 2.
        if (menu == 2)
        {
            //This passes the current number through the digit reverse function.
            return reverse(num);

            //This sets the current number to the result of the function pass.
            num = reverse(num);

            //This tells the user the reversed number.
            cout << "The number reversed is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the number through the prime checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 3.
        if (menu == 3)
        {
            //This passes the current number throught the function to raise the numbers power by 2, 3, or 4.
            return power(num);

            //This sets the current number equal to the result of the power function.
            num = power(num);

            cout << "The number raised to your selected power is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the number through the prime checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 4.
        if (menu == 4)
        {
            //This passes the current number through the sum function.
            return sum(num);

            //This sets the sum of the digits equal to the current number.
            num = sum(num);

            cout << "The sum of the number is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the number through the prime checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 5.
        if (menu == 5)
        {
            //This passes the current number through the funciton to raise the first digit by the second.
            return twodigit(num);

            //This stores the result of the function as the current number.
            num = twodigit(num);

            cout << "The first digit of the number raised to the power of the second is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the number through the prime checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 6.
        if (menu == 6)
        {
            //This passes the current number through the function to raise the first two digits by the third if the third digit is less than or equal to 4.
            return threedigit(num);

            //This stores the result of the function as the current number.
            num = threedigit(num);

            cout << "The first two digits raised to the power of the third is: " << num << endl;

            //This tells the user of the prime number check.
            cout << "Checking if number is prime." << endl;

            //This passes the number through the prime checking function.
            return prime(num);

            //This tells the user a > 10 <  test is being performed on the number.
            cout << "Checking if number is greater than 10." << endl;

            //This passes the current number through the less than 10 check and operations function if required.
            return lessten(num);

            //This sets the stored number equal to the current number so the menu can rerun with the number after operations.
            stored = num;
        }

        //This if statement runs if the user selects menu option 7.
        if (menu == 7)
        {
            //This runs the function to exit the program.
            return quit();
        }

        //This if statement handles the user enters something not listed on the menu.
        if (menu != 1 && menu != 2 && menu != 3 && menu != 4 && menu != 5 && menu != 6 && menu != 7)
        {
            //These five lines explain the error and reason for program shutdown.
            cout << "Error" << endl;
            cout << "Option Selected does not exist." << endl;
            cout << "Please enter options between 1-7 only." << endl;
            cout << "Exiting Program" << endl;
            cout << ". . . . . . . ." << endl;

            //These two lines exit the program.
            exit(15);
            return(15);
        }
        //This increase the value of the LCV by 1 for each loop pass. This allows for the program to choose between the random number and stored number for operations.
        z = z++;

        //This while statement controls the do loop.
    }while (x > 0);

}

```

最佳答案

糟糕，您在这里有无限循环

//This creates a LCV for the do loop below and sets it equal to 0.

int y = 0;

//This do loop generates the random number.
do
{
    //This generates a random time seed.
    srand(time(0));

    //This generates a random number between 1 and 99.
    ran = rand() % 100;

    //This while controls the do loop.
}while (y != 9);

y初始化为0，而您在y!=9时循环。那只是第一个错误，可能还会更多。

错误＃2

int z = 1;
//This makes the program only create a random number the first pass through the loop.
if (z < 2)
{
    //This runs the random number generator function.
    return randomgen();

    //This sets the result of the function as the random number.
    randnum = randomgen();

    //This sets the random number to the current number.
    num = randnum;
}

在randomgen()中修复无限循环后，您将立即返回...

关于c++ - 为什么我的程序不能在GDB在线编译器/调试器或Visual Studio C++ 2019中运行？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/61874229/

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