Calculator capable of displaying processing status and stopping processing and method of the same

A calculator capable of displaying processing status and stopping processing, comprising:

• an input unit adapted for being operated by a user to input an expression into the calculator;
• an algebraic logic processor for controlling and processing the input expression;
• an interrupt detector for detecting a request to stop processing when the expression is processed by the algebraic logic processing unit;
• a counter for counting based on a predefined value when the expression is processed by the algebraic logic processing unit;
• and
• an output unit for displaying processing status of the calculator and calculating results, and displaying a message representing that the expression is processing when the expression is processed by the algebraic logic processing unit;
• wherein, when the counter counts to a first predefined value before the algebraic logic processing unit finishes processing, the output unit displays a terminating message adapted to inquire the user whether to stop the processing or continue the processing, while the algebraic logic processor keeps processing the input expression.