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MIT App Inventor Calculator Tutorial
obsidiansofteducation.blogspot.com/p/calculator-in-mit-app-inventor.htmlYapay zekadan makale özeti
- Screen Design
- Create calculator project with portrait orientation and calculator title
- Design vertical calcScreen layout with question and answer labels
- Add horizontal layouts for basic operations and decimal points
- Place buttons in specific order for different operations
- Code Implementation
- Create global variables for firstNumber, secondNumber, and operator
- Use makeQuestion procedure to join numbers when operators are provided
- Implement decimal button logic to prevent multiple decimal points
- Add clear button to clear all variables and reset decimal
- Calculation Logic
- Equal button checks for non-empty secondNumber before performing operations
- Use nested if blocks to handle different operators
- Handle division by zero by checking secondNumber is not zero
- Set calculated answer to answer label and clear variables