实现对一个数据（int）指定位置0或置1

   

/**********************************************************************  
 * RightMove.cpp   
 * Compiler: GCC,VS,VC6.0  win32  
 * Author:WK 
 * Time: 2015 3 29
 ************************************************************************/  
#include<stdio.h>
void bit_set(unsigned int *p_data, 
			 unsigned int position, bool flag)
{
	if(flag)
	{
		*p_data |= (0x01<<(position-1));
	} 
	else
	{
		int c=(0x01<<(position-1));
		*p_data &= ~c;
	
	}		
}
void main()
{
	              
	//unsigned int ch = 'A';
	unsigned int ch=3;
	bit_set(&ch,3,false);
	//	bit_set(&ch,1,true);
    printf("%d\n",ch);
}