数据转换-位串字节数组

头文件h

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int ByteArr2Bitstr(int ba,int * bs);
int Bitstr2ByteArr(int * bs,int ba);


主函数

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char HStr = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

int ByteArr2Bitstr(int ba,int * bs)
{
    for (int i =0 ; i<8; ++i)
    {
        int nTmp = (1 << i);
        bs[7-i] = (( ba & nTmp) == nTmp )? 1 : 0;
    }
}

int Bitstr2ByteArr(int * bs,int ba)
{
    int n = 0;
    for (int i = 0 ; i < 8; ++i)
    {
        n += bs[7-i] * (1 << i);
    }
    *bs = n;
    return n;
}

int main()
{
    int bitList[8] = { 0 };
    int a;
    sscanf("27", "%x", &a);
    ByteArr2Bitstr(a, bitList);
    printf("0x27 be changed to\n");
    for (int i =0 ; i<8; ++i)
        printf("%i",bitList[i]);
    printf("\n");
    int b,n;
    n=Bitstr2ByteArr(bitList,b);
    printf("the data above be changed to\n");
    printf("%x\n",n);
}