Improved functionality

[Anshuman7080]

Use of static_cast: When seeding the random number generator, using static_cast makes it clear that we're converting time(0) to an unsigned int.

Simplified drawLine Function: The drawLine function uses string(n, symbol) for concise and clear output of the line.

Improved Input Handling: Removed unnecessary nested if statements for clarity, improving the readability of the input validation loops.

Readability Enhancements: Added spacing and structured code for better readability, making it easier to follow the flow of the program.

Variable Initialization: Made sure all variables are initialized appropriately before usage.

This optimized code maintains the original functionality while enhancing clarity, maintainability, and efficiency.