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C Programming - Floating Point Issues - Discussion

Discussion Forum : Floating Point Issues - Find Output of Program (Q.No. 5)
Floating Point Issues
5.
What will be the output of the program? 
#include<stdio.h>
#include<math.h>
int main()
{
    printf("%d, %d, %d\n", sizeof(3.14f), sizeof(3.14), sizeof(3.14l));
    return 0;
}
4, 4, 4
4, 8, 8
4, 8, 10
4, 8, 12
Answer: Option
Explanation:

sizeof(3.14f) here '3.14f' specifies the float data type. Hence size of float is 4 bytes.

sizeof(3.14) here '3.14' specifies the double data type. Hence size of float is 8 bytes.

sizeof(3.14l) here '3.14l' specifies the long double data type. Hence size of float is 10 bytes.

Note: If you run the above program in Linux platform (GCC Compiler) it will give 4, 8, 12 as output. If you run in Windows platform (TurboC Compiler) it will give 4, 8, 10 as output. Because, C is a machine dependent language.

Discussion:
12 comments Page 2 of 2.
Jesal said:   1 decade ago
Answer is 4 8 8. Both double & long double size is same. Its given in internet ( data type range)
Rashmi h k said:   1 decade ago
How can we findout weather it is float or double or long double?
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