how to debug the c code............?

(5 posts)

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sanjeev
Member
Posted 3 months ago #

unsigned int a, b, c;
/* a and b are assume to have some values */
c = (a + b) / 2; // <- There is a bug in this st
What is the bug? and how you debug it?
kartik
Moderator
Posted 3 months ago #

There are few things to note about your program.

1) a,b and c are not initialized.
2) The statement "c = (a + b) / 2" may cause overflow for large values of a and b.

To debug the code, you can add watches for the variables you want to trace.
Abhijeet Deshpande
Member
Posted 3 months ago #

I cannot see any bug other than what karthik commented. You typecast appropriately to get float values upon division. But that would be a semantic error and not a bug.
DJ
Member
Posted 3 months ago #

it will result in overflow..to avoid this use
c=a + (b-a)/2;
Rajiv
Member
Posted 3 months ago #
@Dj:

It will fail for negative values e.g.
a = 20, b = -10;

The output should be 5
But in your case
```
 c = a + (b-a)/2
```
O/P will be : -5