Answer:
Yes. The const modifier means that this code cannot change the value of the variable, but that does not mean that the value cannot be changed by means outside this code. For instance, in the example in II.6, the timer structure was accessed through a volatile const pointer. The function itself did not change the value of the timer, so it was declared const. However, the value was changed by hardware on the computer, so it was declared volatile. If a variable is both const and volatile, the two modifiers can appear in either order.
Reference:
II.6: When should the volatile modifier be used?
II.8: When should the const modifier be used?
II.14: When should a type cast not be used?
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CONTENTS
- Can static variables be declared in a header file? (1)
- I.1: What is a local block? (1)
- I.10: Can an array be an lvalue? (1)
- I.11: What is an rvalue? (1)
- I.13: What is the difference between ++var and var++? (1)
- I.2: Should variables be stored in local blocks? (1)
- I.3: When is a switch statement better than multiple if statements? (1)
- I.4: Is a default case necessary in a switch statement? (1)
- I.5: Can the last case of a switch statement skip including the break? (1)
- I.6: Other than in a for statement (1)
- I.7: How can you tell whether a loop ended prematurely? (1)
- I.8: What is the difference between goto and longjmp() (1)
- I.9: What is an lvalue? (1)
- II.1: Where in memory are my variables stored? (1)
- II.10: How can you determine the maximum value that a numeric variable can hold? (1)
- II.11: Are there any problems with performing mathematical operations on different variable types? (1)
- II.12: What is operator promotion? (1)
- II.13: When should a type cast be used? (1)
- II.14: When should a type cast not be used? (1)
- II.15: Is it acceptable to declare/define a variable in a C header? (1)
- II.16: What is the difference between declaring a variable and (1)
- II.3: What is page thrashing? (1)
- II.4: What is a const pointer? (1)
- II.5: When should the register modifier be used? Does it (1)
- II.6: When should the volatile modifier be used? (1)
- II.7: Can a variable be both const and volatile? (1)
- II.8: When should the const modifier be used? (1)
- II.9: How reliable are floating-point comparisons? (1)
- What is the benefit of using const for declaring constants? (1)
- when is the comma (1)
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- II.5: When should the register modifier be used? D...
- II.6: When should the volatile modifier be used?
- II.7: Can a variable be both const and volatile?
- II.8: When should the const modifier be used?
- II.9: How reliable are floating-point comparisons?
- II.10: How can you determine the maximum value tha...
- II.11: Are there any problems with performing math...
- II.12: What is operator promotion?
- II.13: When should a type cast be used?
- II.14: When should a type cast not be used?
- II.15: Is it acceptable to declare/define a variab...
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