c++怎么写一个函数把输入无论是什么类型都转换成二进制？？

Question

#include "pch.h"#include <iostream>using namespace std;//void allto2(void *p, int b) { unsigned char n; char f, *q; for (f = 0, q = (char *)p + b - 1; q >= p; q--) for (n = 0x80; n; n >>= 1) { cout << (*q&n || 0); f = 1; } cout << endl;}void main(void) { double x; float y; int z; char c; cout << "Input a double-precision number...\nx="; cin >> x; allto2(&x, sizeof(x)); cout << "Input a floating number...\ny="; cin >> y; allto2(&y, sizeof(y)); cout << "Enter an integer...\nz="; cin >> z; allto2(&z, sizeof(z)); cout << "Enter a char...\nc="; cin >> c; allto2(&c, sizeof(c));}我想输入一个数程序自动判断是什么类型然后计算，我用了if语句但是没用，有没有大神帮帮忙