C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - Point Out Correct Statements (Q.No. 6)
6.
| 1 : | typedef long a; extern int a c; |
| 2 : | typedef long a; extern a int c; |
| 3 : | typedef long a; extern a c; |
Answer: Option
Explanation:
typedef long a;
extern int a c; while compiling this statement becomes extern int long c;. This will result in to "Declaration syntax error".
typedef long a;
extern a int c; while compiling this statement becomes extern long int c;. This will result in to "Too many types in declaration error".
typedef long a;
extern a c; while compiling this statement becomes extern long c;. This is a valid c declaration statement. It says variable c is long data type and defined in some other file or module.
So, Option C is the correct answer.
Discussion:
14 comments Page 2 of 2.
Kiran said:
1 decade ago
Before and after type def it will not allow any data types.
but these are valid and also same lets try
1.extern int long x
2.extern long int x
3.long extern int x
4.int extern long x
but these are valid and also same lets try
1.extern int long x
2.extern long int x
3.long extern int x
4.int extern long x
(1)
Megha said:
1 decade ago
Whats wrong with long int. ?
Shibi said:
1 decade ago
Yeah jatin is correct it will be considered as a long int datatype.
JATIN said:
1 decade ago
1. typedef long a;
2. extern a int c;
In this case if we replace a in second statement with long it will not show error. And I think if we use typedef then it is literally substituted for the given name.
2. extern a int c;
In this case if we replace a in second statement with long it will not show error. And I think if we use typedef then it is literally substituted for the given name.
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