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Language in C Interview Questions and Answers

Question: What's the difference between these two declarations?

struct str1 { ... } ;
typedef struct { ... } str2 ;

Answer: The first form declares a structure tag whereas the second declares a typedef. The main difference is that the second declaration is of a slightly more abstract type -- its users don't necessarily know that it is a structure, and the keyword struct is not used when declaring instances of it.

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Language in C Interview Questions and Answers

Question: What's the difference between these two declarations?struct str1 { ... } ;typedef struct { ... } str2 ;

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Question: What's the difference between these two declarations?

struct str1 { ... } ;
typedef struct { ... } str2 ;