Once I have seen a code switch
// * /
Codesegement1;
// * /
Change the first line of change
/ * /
Codesegement1;
// * /
Later, in my practice, I found a wonderful usage.
Code switching switch
// ---------------------- The first paragraph is effective, the second paragraph is annotated
// * /
Codesegement1;
/ * /
Codesegement2;
// * /
Simply delete the first line / can become
// ---------------------- The first paragraph is annotated, the second paragraph is effective
/ * /
Codesegement1;
/ * /
Codesegement2;
// * /
