11.24位运算3,4

#include <stdio.h>


int output_num_p1top2(int n,int p1,int p2,int arr[])
{
int i;
int j;
int a;
int temp = 0;


for(i = p1 - 1; i <= p2; i++)
{
temp = !((n >> i) & 1);
arr[i] = temp;
i++;
}
for(j = (p2 - p1); j >= 0; j--)
{
printf("%d",arr[j]);
}
printf("\n");
}


int main()
{
int n;
int p1;
int p2;
int arr[32] = {0};
printf("input a num:");
scanf("%d",&n);
printf("input p1 and p2(p1 < p2):");
scanf("%d %d",p1,p2);
output_num_p1top2(n,p1,p2,arr);


    return 0;

}

#include <stdio.h>


void change(int a,int p,int v)
{
int i;
int temp;
int arr[32];
    
for(i = 0; i < 32; i++ )
{
temp = (a >> i) & 1;
arr[i] = temp;
}
for(i = 31;i >= 0; i--)
{
if(i == (p - 1))
{
arr[i] = v;
}
   else
{
printf("%d",arr[i]);
}
printf("\n");

}


int main()
{
int a;
int v;
int p;


printf("please input a num:");
scanf("%d",&a);
printf("please input p(p < 32):");
scanf("%d",&p);
printf("please input v(0 | 1):");
scanf("%d",&v);


    change(a,p,v);


    return 0;
}