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Language in C Interview Questions and Answers

Ques. What's the difference between these two declarations?

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