二进制打印与逆序_C语言（转）

//二进制逆序 by MoreWindows( http://blog.csdn.net/MoreWindows )  
#include <stdio.h>

//二进制打印函数
template <class T>
void PrintfBinary(T a)
{
    int i;
    for (i = sizeof(a) * 8 - 1; i >= 0; --i)
    {
        if ((a >> i) & 1)
            putchar(‘1‘);
        else 
            putchar(‘0‘);
        if (i == 8)
            putchar(‘ ‘);
    }
    putchar(‘\n‘);
}
int main()
{
    printf("二进制逆序 \n\n");

    printf("逆序前:    ");
    unsigned short a = 0x1FFF;
    PrintfBinary(a);
    a = ((a & 0xAAAA) >> 1) | ((a & 0x5555) << 1);
    a = ((a & 0xCCCC) >> 2) | ((a & 0x3333) << 2);
    a = ((a & 0xF0F0) >> 4) | ((a & 0x0F0F) << 4);
    a = ((a & 0xFF00) >> 8) | ((a & 0x00FF) << 8);

    printf("逆序后:    ");
    PrintfBinary(a);

    printf("false   ");
}