[C language] break and continue in switch statement

We're writing switch In the process of statement , Usually each case（ or default） The following sentences are marked with “break” ending ：

switch (int)

{

    case int1:

        ...;

        break;

    case int2:

        ...;

        break;

    default:

        ...;

        break;

} 

If you don't write break What will happen? ？

According to our preset idea , Should carry out case 0： Under the code , The result should be b=2.

The actual operation result is b=1, Explain that after execution b++ After that, the code didn't jump out switch Statement to execute printf, Instead, it went on default Under the b--, Cause the final result to deviate .

And add break There is no problem with the result of running after the statement ！

So I'm writing switch Be sure to pay attention to this small detail when you write sentences ！！！ 

So I'm writing switch Be sure to pay attention to this small detail when you write sentences ！！！ 

So I'm writing switch Be sure to pay attention to this small detail when you write sentences ！！！ 

（ Important things are to be repeated for 3 times ）