//编写函数,将一个数的指定位置置0或置1 #include <stdio.h> unsigned int set_bit(unsigned int num, int pos, int flag) { int n = 1; n = n << (pos - 1); //将n的第pos位置1,其它全为0 if (flag == 0) { num = num&(~n); } else if (flag == 1) { num = num | n; } else printf("flag error\n"); return num; } int main() { printf("%d\n", set_bit(3,1,0)); //2 printf("%d\n", set_bit(4, 2, 1)); //6 printf("%d\n", set_bit(15, 5, 1)); //31 return 0; } <img src="http://img.blog.csdn.net/20150630155139259?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZG91ZG91d2ExMjM0/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" />
时间: 2024-12-27 18:12:48