Angle Classification Code

Code Analysis

The provided code aims to classify an angle based on its measure. It categorizes the angle into three types: "llano" for 180 degrees, "recto" for 90 degrees, and "agudo" for angles less than 90 degrees. However, there are several issues in the code:

Issues Identified

1. Indentation Errors: The return statements are not properly indented, which would lead to indentation errors in Python.
2. Undefined Variable: The input inf is incorrectly used. Instead, the user should directly use input().
3. No handling for angles greater than 180 or negative angles: The function does not address any angles outside of the specified categories.
4. Lack of Input Validation: The code does not check whether the input is a valid number.
5. Missing Return for Unsupported Angles: Angles greater than 180 degrees or negative angles need an explicit return value.

Solution Development

The solution will include fixing the identified issues, adding necessary input validation, and enhancing the function's functionality to classify angles outside the original set.

Proposed Code

The revised code is as follows:

def angulo(a):
    """
    Categorizes an angle based on its measure.
    
    Parameters:
    a (float): The angle in degrees.
    
    Returns:
    str: Description of the angle type.
    """
    # Input validation
    if not isinstance(a, (int, float)):
        return "Invalid input: must be a number."

    if a < 0:
        return "Invalid angle: cannot be negative."
    elif a < 90:
        return "agudo"
    elif a == 90:
        return "recto"
    elif a == 180:
        return "llano"
    else:
        return "obtuso"  # Angles greater than 180 degrees and less than 360 are classified as 'obtuso'.

# Main execution block
if __name__ == "__main__":
    try:
        ang = float(input("angulo: "))  # Convert input to float for angle classification
        print(angulo(ang))  # Call the function and print its result
    except ValueError:
        print("Invalid input: Please enter a valid number.")
    print("fin...")

Explanation of the Code

1. Function Definition: The function angulo(a) takes one parameter and returns a string that describes the angle.
2. Input Validation: It checks whether the input is a number and whether it is non-negative.
3. Angle Classification:
   • Handles angles less than 90 degrees as "agudo".
   • Classifies 90 degrees as "recto".
   • 180 degrees as "llano".
   • Angles greater than 180 degrees (up to 360) are classified as "obtuso".
4. Main Execution Block: Ensures the function runs correctly in an executed script, with error handling for non-numeric input.

Usage Example

This code can be executed in a Python environment. Here is a hypothetical user interaction:

angulo: 45
agudo
fin...

The user inputs an angle of 45 degrees, which is classified correctly as "agudo".