Question

5. Write the pseudo code to solve the following problem (10pts/10pts) You are asked to write a calculator program. Your calculator must perform Addition, Subtraction, Division and Multiplication. The user will enter two numbers and then an operator. If the user enters an operator other than the four mentioned the program will display an error message otherwise it will display the answer. Demonstrate use of an if statement

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Answer 1

A pseudocode is an informal language that helps to develop algorithms. It is always general and it doesnot matter what language the final output would be.
So, a pseudocode for java, javascript, C, C# etc would all look the same.

The idea is to input 2 digits one-by-one followed by enter and then checking whether user entered a valid number neither a character nor an operator. Then input the operator symbol. Check whether it is the required or not. Then finally output the result and exit.

Calculator:
CREATE an html label
READ number1 and DISPLAY on the label
check whether it is a valid number
IF not, OUTPUT ERROR
READ number2 and DISPLAY on the label
check whether it is a valid number
IF not, OUTPUT ERROR
READ an operator and DISPLAY on the label
check whether it is one of the 4 given operators
IF not, OUTPUT ERROR
OUTPUT the result, number1 (operator) number2

1 A pseudocode is an informal language that helps to develop algorithms. It is always general and it doesnot matter what language the final output would be 2 So, a pseudocode for java, javascript , C, C# etc would аїї look the same . 4 The idea is to input 2 digits one-by-one followed by enter and then checking whether user entered a valid number neither a character nor an operator. Then input the operator symbol. Check whether it is the required or not. Then finally output the result and exit. 5 6 Calculator: 7 CREATE an html label 8 READ numberl and DISPLAY on the label check whether it is a valid number 10 11 READ number2 and DISPLAY on the label 12 13 14 READ an operator and DISPLAY on the label 15 16 17 OUTPUT the result, numberl (operator) number2 IF not, OUTPUT ERROR check whether it is a valid number IF not, OUTPUT ERROR check whether it is one of the 4 given operators IF not, OUTPUT ERROR