【C語言】編寫函數，將一個數的指定位置置0或置1

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//編寫函數，將一個數的指定位置置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);    //將n的第pos位置1，其它全為0if (flag == 0){num = num&(~n);}else if (flag == 1){num = num | n;}elseprintf("flag error\n");return num;}int main(){printf("%d\n", set_bit(3,1,0));     //2printf("%d\n", set_bit(4, 2, 1));   //6printf("%d\n", set_bit(15, 5, 1));  //31return 0;}<img src="http://img.blog.csdn.net/20150630155139259?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZG91ZG91d2ExMjM0/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center"  />

【C語言】編寫函數，將一個數的指定位置置0或置1