C + + Primer Learning Summary 5th Chapter statement

5th Chapter Statement

1. The case label in switch must be an integer constant expression and cannot be a variable or a non-integral type:

Note that the second case 3.14 does not have an error in c++11, but the compilation does not pass in c++98.

2. Note that the case statement of the switch statement initializes a variable:

A case statement cannot skip initialization of a variable, and you can skip the definition of the variable.

3. The scope for statement can not only declare variables with auto:

for arrays , however, use the range for statement with caution

4. A goto statement cannot skip initialization of a variable and can skip the definition of a variable:

5. Simple exception Handling code example:

C + + Primer Learning Summary 5th Chapter statement