C语言，进制转换之八进制转二进制，完整代码-蒲公英云

C语言，进制转换之八进制转二进制，完整代码

小鱼儿 2022-06-08 12:28 379阅读 0赞

#include "iostream"
using namespace std;
#define MAX 50
int main()//八转二
{
    int elem2[MAX];
    char elem8[MAX];
    cout << "请输入八进制数，并以‘$’结束：";
    int flag = 1;
    char ch;
    int i = 0;
    while (flag)
    {
        cin >> ch;
        if (ch != '$')
        {
            elem8[i] = ch;
            i++;
        }
        else
        {
            flag = 0;
        }
    }
    int length1 = i;
    int length2 = 0;
    int n = 0;
    int sum = 0;
    for (n = 0; n < length1; n++)//判断是否是八进制数
    {
        int x = (int)elem8[n];
        if (x>=48&&x<=55)
            sum++;
    }
    if (sum == length1)
    {
        int j = 0;
        int number = 0; 
        int k = 0;
        int p = 0;
        int m = 0;
        int cout = 2;
        for (j = 0; j < length1; j++)
        {
            m = cout;
            number = elem8[j] - 48;
            if (number != 1)
            {
                do
                {
                    elem2[m] = number % 2;
                    number = number / 2;
                    length2++;
                    k++;
                    m--;
                } while (number>1);
                if (k == 2)
                {
                    elem2[m] = 1;
                    length2++;
                    m--;
                }
                else
                {
                    elem2[m] = 1;
                    length2++;
                    m--;
                    elem2[m] = 0;
                    length2++;
                    m--;
                }
                k = 0;
            }
            else
            {
                elem2[m] = 1;
                m--;
                length2++;
                for (p = 0; p < 2; p++)
                {
                    elem2[m] = 0;
                    length2++;
                    m--;
                }
            }
            cout = cout + 3;
        }
    }
    else
    {
        cout << "输入的不是八进制数！";
    }
    cout << "正序输出：";
    for (i = 0; i < length2;i++)
        cout << elem2[i] << " ";
    cout << endl;
    return 0;
}