1030

//输入一个整数a,再输入两个整数p1,p2(p1,p2<32),将该整数的二进制表示方法中从右端开始的p1到p2位取反后输出


#include <stdio.h>


int main()
{
int out(int a, int p1, int p2);
int p1, p2;
int a;
    printf("please input the number A:\n");
scanf("%d",&a);
    printf("please input p1 and p2(p1<p2<32):\n");
scanf("%d %d",&p1,&p2);
printf("The final num from p1 to p2 is:\n");
    out(a, p1, p2);
    return 0;
}
int out(int a,int p1,int p2)
{
int mark = 0;                //标志位mark
int bit = 1;
int m;
int i = 0;
    int n[32];
a >>= (p1 - 1);
while ( mark != p2 - p1 + 1) //mark为p2-p1时终止循环
{
m = a;
m &= bit;
        n[i] = (~m) + 2;
i++;
a>>=1;
mark++;
}
for (i = (p2 - p1); i >= 0 ; i--)   //输出p1到p2
{
printf("%d",n[i]);
}
printf("\n");
}