Yahoo Interview Question for Software Engineer / Developers






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Differences between pointer and reference

1 Reference syntax like pointers semantics like value
2 Must be initialized while declaration and cannot change it once initialized

3 reference cannot be dereferenced

- Saurabh Abichandani December 04, 2006 | Flag Reply
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Add: Cannot have an array of references

- Anonymous March 07, 2007 | Flag Reply
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There are 4 differences.

1. Pointer can be initialized later after it is declared, whereas reference has be initialized during declaration.
2. Pointer can point to null, whereas null reference is not permitted.
3. An array of pointers like int *p[10] is allowed where an array of references like int &p[10] is not allowed
4. You can have a pointer to pointer whereas you cannot have a reference to a reference.

- Dumbo February 15, 2009 | Flag Reply
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Sorry, 4th point is incorrect.

- Dumbo February 15, 2009 | Flag Reply


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