带有不带返回值的参数的函数在turbo c++上不能正常工作。

Question

我有一个程序，你们中的一些人可能已经从我过去的问题中看到了。这是关于将十进制转换为二进制和八进制，将二进制转换为十进制和八进制，以及将八进制转换为十进制和二进制。

#include<stdio.h>

void MainMenu();
int UserInput();
unsigned long Dec2BinOct(unsigned long n);
void Dec2BinOct2(unsigned long n);
unsigned long Bin2DecOct(unsigned long n);
unsigned long Bin2DecOct2(unsigned long dec);
unsigned long Oct2BinDec(unsigned long n, int base, int base2);

unsigned long main()
{
    char choice;
    unsigned long n;


   clrscr();
   do{
    unsigned long bin, o, dec;

    MainMenu();
    printf("enter your choice: ");
    scanf(" %c", &choice);
    printf("\n");
    switch(choice){

        case 'A':
        case 'a':

            printf("Conversion: Decimal to binary and octal.\n");
            printf("Enter number: ");
        n = UserInput();

            o   = Dec2BinOct(n);

            printf("%lu in Decimal is ", n);
        Dec2BinOct2(n);
        printf(" in Binary Form.\n");
            printf("%lu in Decimal is %lu in Octal Form.\n\n", n, o);

        break;

        case 'B':
        case 'b':
            printf("Conversion: Binary to decimal and octal.\n");
            printf("Enter number: ");
            n = UserInput();


            dec = Bin2DecOct(n);
            o = Bin2DecOct2(dec);

            printf("%lu in Binary is %lu in Decimal Form.\n", n, dec);
            printf("%lu in Binary is %lu in Octal Form.\n\n", n, o);

        break;

        case 'c':
        case 'C':
            printf("Conversion: Octal to decimal and binary.\n");
            printf("Enter number: ");
            n = UserInput();


            bin = Oct2BinDec(n, 2, 10);
            dec = Oct2BinDec(n, 10, 8);

            printf("%lu in Octal is %lu in Binary Form\n", n, bin);
            printf("%lu in Octal is %lu in Decimal Form.\n\n", n, dec);


        case 'd':
        case 'D':
            printf("Exit.\n\n");
        break;

        default:
          break;

    }

   }while(choice != 'd'&& choice != 'D');
    getch();
}

void MainMenu()
{
    printf("Choices:\na. Decimal to binary and octal\nb. Binary to decimal and octal\nc. Octal to decimal and binary\nd. Exit.\n\n");
}

int UserInput(n)
{
    scanf("%lu", &n);
    return n;
}

unsigned long Dec2BinOct(unsigned long n)
{
    unsigned long place=1, bin=0;
    for(; n != 0; place *= 10)
                    {

                        bin   += n % 8 * place;
                        n     = n / 8;
                    }
    return(bin);
}

void  Dec2BinOct2(unsigned long n)
{
    int x=25, y=24;
    unsigned long p=n;
    while(x)
    {
        if(n<pow(2, x))
        {
            if(n>=pow(2, y))
            {
                printf("1");
                n-=pow(2, y);
            }
            else if(n<p)
            {
                printf("0");
            }
        }

        x--;
        y--;
    }

}

unsigned long Bin2DecOct(unsigned long n)
{
    unsigned long ans=1, dec=0;
    for(; n != 0; ans *= 2)
                    {
                        
                        dec = dec + n % 10 * ans; 
                        n   = n / 10;
                    }
    return(dec);
}

unsigned long Bin2DecOct2(unsigned long dec)
{
    unsigned long o=0, place=1;
    while (dec != 0)
                    {
                        o     = o + (dec % 8) * place;
                        dec   = dec / 8;
                        place = place * 10;
                    }
    return(o);
}

unsigned long Oct2BinDec(unsigned long n, int base, int base2)
{
    unsigned long bin=0, place=1;
    for(; n != 0; place *= base2)  
                    {      
                        bin   += n % base * place;
                        n     = n / base;  
                    }
    return(bin);
}

但是当我选择选项字母a/A时，函数Dec2BinOct2(n)就不能正常工作了。打印不出来。

Choices:
a. Decimal to binary and octal
b. Binary to decimal and octal
c. Octal to decimal and binary
d. Exit.

enter your choice: >>>a

Conversion: Decimal to binary and octal.
Enter number: >>>123
123 in Decimal is in Binary Form.
123 in Decimal is 173 in Octal Form.

但在dcoder中，它工作得很好。我很感谢你的帮助。

Answer 1

我现在知道答案了。

#include<math.h>

这就是为什么电源函数不能工作，也不能打印的原因。不管怎样，谢谢你们！