C Programming - Declarations and Initializations - Discussion
Discussion Forum : Declarations and Initializations - General Questions (Q.No. 7)
7.
Which of the following is not user defined data type?
| 1 : | |
| 2 : | |
| 3 : | |
Answer: Option
Explanation:
C data types classification are
- Primary data types
- int
- char
- float
- double
- void
- Secondary data types (or) User-defined data type
- Array
- Pointer
- Structure
- Union
- Enum
So, clearly long int l = 2.35; is not User-defined data type.
(i.e.long int l = 2.35; is the answer.)
Discussion:
49 comments Page 5 of 5.
Karthick said:
1 decade ago
Structure is the collection of different datatype under the common name, union is similar to structure the difference is. In union we can achieve the memory management ie, only the particular data that we call will occupy memory, enum is already explained above.
Vineet said:
1 decade ago
can we define : char enum day[sun,mon];
Tanishka said:
1 decade ago
Can any one give the example of Union?
Shiva said:
1 decade ago
Then what is "long int l = 2.35;" data type called ?
Saru said:
1 decade ago
@Vineet
We cannot define: char enum day[sun,mon]
But we can give it as follows:
#include<stdio.h>
int main()
{
enum var {var1='a',var2,var3};
enum num {num1=5,num2,num3};
printf("%c %c %c \n",var1,var2,var3);
printf("%d %d %d",num1,num2,num3);
return 0;
}
Where the output will be:
a b c
5 6 7
Because, enum is a user defined data type. It is a data type by itself. So you cannot declare it with a built in data type.
We cannot define: char enum day[sun,mon]
But we can give it as follows:
#include<stdio.h>
int main()
{
enum var {var1='a',var2,var3};
enum num {num1=5,num2,num3};
printf("%c %c %c \n",var1,var2,var3);
printf("%d %d %d",num1,num2,num3);
return 0;
}
Where the output will be:
a b c
5 6 7
Because, enum is a user defined data type. It is a data type by itself. So you cannot declare it with a built in data type.
Pradeep chandra said:
1 decade ago
Then what about string?
Ayana said:
1 decade ago
String belongs to array. Its array of characters.
Kavitha said:
1 decade ago
What is meant by user defined data type?
Vinita said:
1 decade ago
@Saru.
Does the value of val and num automatically get incremented?
And if val1 was not initialized what value it would have taken ?
Does the value of val and num automatically get incremented?
And if val1 was not initialized what value it would have taken ?
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