C语言实现进制转换

古城微笑少年丶 2022-05-15 04:47 200阅读 0赞

**基本功能：**  
1、十进制转换二进制  
2、十进制转换八进制  
3、十进制转换十六进制  
4、二进制转换十进制  
5、八进制转换十进制  
6、十六进制转换十进制  
0、 退 出

**代码实现：**

#include<stdio.h>
    #include<stdlib.h>
    #include<math.h>
    
    void mune()
    {
        printf("******************************************************\n");
        printf("** **\n");
        printf("** 进制转换 **\n");
        printf("** **\n");
        printf("** 1、十进制转换二进制 **\n");
        printf("** 2、十进制转换八进制 **\n");
        printf("** 3、十进制转换十六进制 **\n");
        printf("** 4、二进制转换十进制 **\n");
        printf("** 5、八进制转换十进制 **\n");
        printf("** 6、十六进制转换十进制 **\n");
        printf("** 0、 退 出 **\n");
        printf("** **\n");
        printf("******************************************************\n");
    }
    
    void TenToTwo()
    {
        int num,m, c, i = 0;
        int n = 2;
        int a[32];
        printf("输入一个整数：");
        scanf("%d", &num);
        m = num;
        while (num>0)
        {
            c = (num % n);
            a[i] = c;
            num = num / n;
            i++;
        }
        printf("十进制数%d转换成二进制数是：", m);
        for (i--; i >= 0; i--)           //将数组倒序输出
            printf("%d", a[i]);
        printf("\n");
    }
    
    void TenToEight()
    {
        int num, m, c, i = 0;
        int n = 8;
        int a[32];
        printf("输入一个整数：");
        scanf("%d", &num);
        m = num;
        while (num>0)
        {
            c = (num % n);
            a[i] = c;
            num = num / n;
            i++;
        }
        printf("十进制数%d转换成八进制数是：", m);
        for (i--; i >= 0; i--)           //将数组倒序输出
            printf("%d", a[i]);
        printf("\n");
    }
    
    void TenToSixteen()
    {
            char arr[] = "0123456789ABCDEF";
            char hex[16];
            int i = 0;
            int j = 0;
            int num = 0,a = 0;
            printf("输入一个整数：");
            scanf("%d", &num);
            a = num;
            while (num)
            {
                hex[i++] = arr[num % 16];   //对十进制数求余并最终与hextable数组中的字符匹配
                num = num / 16;
            }
            printf("十进制数%d转换成十六进制数是：", a);
            for (j = i - 1; j >= 0; --j)
                printf("%c", hex[j]);
            printf("\n");
    }
    
    void TwoToTen()
    {   
            long long n,a;
            int sum = 0, i = 0, m;
            printf("输入一个二进制数: ");
            scanf("%lld", &n);
            a = n;
            while (n != 0)
            {
                m = n % 10;
                n /= 10;
                sum += m*pow(2, i);
                ++i;
            }
            printf("二进制数 %lld 转换为十进制为 %d\n", a, sum);
    }
    
    void EightToTen()
    {
        int n, a;
        int sum = 0, i = 0, m;
        printf("输入一个八进制数: ");
        scanf("%d", &n);
        a = n;
        while (n != 0)
        {
            m = n % 10;
            n /= 10;
            sum += m*pow(8, i);
            ++i;
        }
        printf("八进制数 %d 转换为十进制为 %d\n", a, sum);
    }
    
    void SixteenToTen()
    {
        int num = 0;
        printf("输入一个十六进制数: ");
        scanf("%x", &num);
        printf("十六进制数 %x 转换为十进制为 %d\n", num, num);
    }
    
    int main()
    {
        int n = 0;
        while (1)
        {
            mune();
            printf("请选择：");
            scanf("%d", &n);
            switch (n)
            {
            case 1:TenToTwo();
                break;
            case 2:TenToEight();
                break;
            case 3:TenToSixteen();
                break;
            case 4:TwoToTen();
                break;
            case 5:EightToTen();
                break;
            case 6:SixteenToTen();
                break;
            case 0:
                exit(0);
                break;
            default:
                printf("您的选择错误!!!\n");
                break;
            }
        }
    }

**运行结果：**  
![这里写图片描述][70]![这里写图片描述][70 1]![这里写图片描述][70 2]![这里写图片描述][70 3]![这里写图片描述][70 4]![这里写图片描述][70 5]![这里写图片描述][70 6]![这里写图片描述][70 7]

[70]: https://img-blog.csdn.net/20180824192404374?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: https://img-blog.csdn.net/20180824192414605?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 2]: https://img-blog.csdn.net/20180824192422891?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 3]: https://img-blog.csdn.net/20180824192431145?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 4]: https://img-blog.csdn.net/20180824192440750?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 5]: https://img-blog.csdn.net/20180824192450370?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 6]: https://img-blog.csdn.net/2018082419245984?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyODIwNjIy/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 7]: /images/20220515/ae36e662d6664653b21f773c3106318a.png