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src/main/java/Calculator.java

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public class Calculator {
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int add(int a, int b) {
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return a + b;
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}
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int subtract(int a, int b) {
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return a - b;
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}
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int multiply(int a, int b) {
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return a * b;
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}
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int divide(int a, int b) {
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if (b == 0) {
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throw new ArithmeticException("0으로 나눌 수 없습니다.");
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}
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return a / b;
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}
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}

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