如何使用按位运算符连接 2 个数字，同时保持变量的初始值不变？

Question

I can not use sprintf, or any other function that puts everything together in a string n, I can not really use any libc function, it's part of a challenge I'm trying to solve

鉴于：

int x=5;
int y=2;

预期输出：

res = 52;

Answer 1

这是一种可能的解决方案：

#include <stdio.h>

int main()
{
   int x= 342;
   int y= 224;
   int aux = y;
   while( aux ) {
      aux /= 10;
      x*= 10;
   }
   x+= y;
   printf("x= %d\r\n", x);  // prints 342224
}

如何使用按位运算符连接 2 个数字，同时保持变量的初始值不变？

How to concatenate 2 numbers using bit-wise operator, leaving initial values of variables intact?

c

bit-shift