finalpractical

[Tanmay8989]

Title- finalpractical
Issue Description:
In "num.c" a undeclared variable "num3" is used. And another variable "num2" is declared but not issued and as for the "sum" it has to be the sum of the integers entered by the user but due to bug it may not run accordingly.

Need for fixing this Issue:
As an undeclared variable is used, it will result in compilation error as the declared variable which was to be used for finding the sum is not used. And as for the "sum" it has to be the sum of the integers entered by the user. Because of the bugs output will not be obtained.

Reproducing in case of bug:
Step 1: Clone the repository to your computer
Step 2: Try compiling the num.c file
Step 3: Observe the error indicating use of undeclared variable

Other Note/Environment Info:
OS: Windows
Compiler: gcc compiler

@vpriyapm plz fix the issue