C ++ Primer learning summary chapter 1 statements, Chapter 4 primer

C ++ Primer learning summary chapter 1 statements, Chapter 4 primer
Chapter 1 Statements

1. The case label in the switch must beInteger constant expressionCannot be a variable or a non-integer type:

Note that the second case 3.14 can be executed without errors in C ++ 11, but the compilation fails in C ++ 98.

 

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

The Case statement cannot skip the initialization of variables, but can skip the definition of variables.

 

3. The range for statement can not only declare variables using auto:

HoweverFor arrays, Use the range for statementBe careful

 

4. The goto statement cannot skip variable initialization. you can skip the definition of variables:

 

5. SimpleException HandlingSample Code: