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# C Programming - Floating Point Issues

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### Exercise

"Everything should be made as simple as possible, but not simpler."
- Albert Einstein
1.

What are the different types of real data type in C ?

 A. float, double B. short int, double, long int C. float, double, long double D. double, long int, float

2.

What will you do to treat the constant 3.14 as a long double?

 A. use 3.14LD B. use 3.14L C. use 3.14DL D. use 3.14LF

3.

If the binary eauivalent of 5.375 in normalised form is 0100 0000 1010 1100 0000 0000 0000 0000, what will be the output of the program (on intel machine)?

``````#include<stdio.h>
#include<math.h>
int main()
{
float a=5.375;
char *p;
int i;
p = (char*)&a;
for(i=0; i<=3; i++)
printf("%02x\n", (unsigned char)p[i]);
return 0;
}
``````

 A. 40 AC 00 00 B. 04 CA 00 00 C. 00 00 AC 40 D. 00 00 CA 04

4.

Which of the following range is a valid long double (Turbo C in 16 bit DOS OS) ?

 A. 3.4E-4932 to 1.1E+4932 B. 3.4E-4932 to 3.4E+4932 C. 1.1E-4932 to 1.1E+4932 D. 1.7E-4932 to 1.7E+4932

5.

Which statement will you add in the following program to work it correctly?

``````#include<stdio.h>
int main()
{
printf("%f\n", log(36.0));
return 0;
}
``````

 A. #include B. #include C. #include D. #include