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A simple calculator reads n lines. Each line should look like a op b: two integers and one operator from + - * / %, separated by single spaces. Print the integer result of each line.
A bad line must not stop the calculator. Check in this order and print:
Error: expected a op b if the line does not have exactly 3 parts,Error: bad number if a or b is not a whole number,Error: unknown operator <op> if the operator is not one of the five,Error: division by zero if / or % has b = 0.Example 1
Input
4 12 + 30 7 / 2 9 % 0 5 ^ 2
Output
42 3 Error: division by zero Error: unknown operator ^
7 / 2 is 3 in integer division.
Example 2
Input
3 5 + x * 3 1 + 2 + 3
Output
Error: expected a op b Error: bad number Error: expected a op b
Try the problem first. Open one hint at a time.
Split each line with split(" ") and throw IllegalArgumentException("expected a op b") when there are not 3 parts.
Pick the operation with an if-else chain; in the last else, throw IllegalArgumentException("unknown operator " + op).
Catch NumberFormatException and ArithmeticException before IllegalArgumentException, and print e.getMessage() for the last one.
Write your Java code, run it on the examples and submit it to hidden tests.
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