全部博文(395)
分类: C/C++
2011-10-19 12:37:06
一个算法 unsigned short SwapBit16(unsigned short Data) { int i; unsigned short Dest; Dest = 0; for(i=0;i<8;i++) Dest |= ((((Data&(1< return Dest; } 上面这个函数实现对16位数的反转(倒序变换)。 实现的思路,可以使用如下方法来测试一下。 这个是一个测试函数 #include int main(void ) { int i; unsigned short Data=45918; int Dest = 0; for(i=0;i<8;i++){ printf("Date1 is 0x%x \n",(((Data&(1< printf("Date2 is 0x%x \n",(((Data&(1<<(15-i)))?1:0)< printf("Date2 and Date1 is 0x%x \n",((((Data&(1< Dest |= ((((Data&(1< } printf("the 0b1011001101011110 end the Date is 0x%x\n",Dest); return Dest; } 下面是测试信息结果: Date1 is 0x0 Date2 is 0x1 Date2 and Date1 is 0x1 Date1 is 0x4000 Date2 is 0x0 Date2 and Date1 is 0x4000 Date1 is 0x2000 Date2 is 0x4 Date2 and Date1 is 0x2004 Date1 is 0x1000 Date2 is 0x8 Date2 and Date1 is 0x1008 Date1 is 0x800 Date2 is 0x0 Date2 and Date1 is 0x800 Date1 is 0x0 Date2 is 0x0 Date2 and Date1 is 0x0 Date1 is 0x200 Date2 is 0x40 Date2 and Date1 is 0x240 Date1 is 0x0 Date2 is 0x80 Date2 and Date1 is 0x80 the 0b1011001101011110 end the Date is 0x7acd 从结果可看出,实现思想是15<-->0,14<-->1,13<-->2,......8<-->7相交换,具体怎么实现的,你自己可以深入分析一下。。