有没有大神解释一下，这个程序最后为什么会这样。

代码
#include<iostream>
using namespace std;
int main(void) {
const int b = 5;
int *m = (int *)&b;
const int *c = &b;
cout << "const b: " << b << " " << &b << endl;
cout << " *m: " << *m << " " << m << endl;
cout << "const *c: " << *c << " " << c << endl;
*m = 7;
cout << "*m=7" << endl;
cout << "const b: " << b << " " << &b << endl;
cout << " *m: " << *m << " " << m << endl;
cout << "const *c: " << *c << " " << c << endl;
if (&b == m) {
cout << "m point to b";
if (b != *m)
cout << " but *m!=b";
}
return 0;
}