C Programming - Floating Point Issues - Discussion
Discussion Forum : Floating Point Issues - General Questions (Q.No. 6)
6.
We want to round off x, a float, to an int value, The correct way to do is
Answer: Option
Explanation:
Rounding off a value means replacing it by a nearest value that is approximately equal or smaller or greater to the given number.
y = (int)(x + 0.5); here x is any float value. To roundoff, we have to typecast the value of x by using (int)
Example:
#include <stdio.h>
int main ()
{
float x = 3.6;
int y = (int)(x + 0.5);
printf ("Result = %d\n", y );
return 0;
}
Output:
Result = 4.
Discussion:
24 comments Page 2 of 3.
Narendra jain said:
1 decade ago
For rounding of we have to use only int (x) because we have to round of only x and also remember what the syntax of explicit type conversion.
Ravindra said:
1 decade ago
(int)((int) x+0.5) This is also correct. It also rounds off. Then why only a option. D option also correct. Reply.
Aenk said:
1 decade ago
If we enter x=3.3 it means 3<x<3.5 we get 3 value so in this example is .5 addition is not needed.
MrMino said:
10 years ago
The answer should be C:
float x = 4.2;
printf("%f\n", (int)x + 0.5 );
Outputs 4.500000.
float x = 4.2;
printf("%f\n", (int)x + 0.5 );
Outputs 4.500000.
Ganga said:
1 decade ago
What is return function can you explain for me?
Why it z return0 we can also put only return know!
Why it z return0 we can also put only return know!
Rani said:
1 decade ago
But option (A)=4
option(B)=3
means both are correct we need only round off not say Floor or ceil
option(B)=3
means both are correct we need only round off not say Floor or ceil
Vishak said:
1 decade ago
@Ashish: i too thought the same why cant we ? is there a proper explanation ?
Kanta patidar said:
1 decade ago
option (a)=4
option(c)=3
option(d)=3
it means tino option is right
option(c)=3
option(d)=3
it means tino option is right
Ashish Gupta said:
1 decade ago
We can use both
a) y= int(x+0.5)
b) y= (int)(x+0.5)
a) y= int(x+0.5)
b) y= (int)(x+0.5)
Anshul Jain said:
10 years ago
Why option C is wrong? Please explain any one.
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