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Added error handling for division by zero #255

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Added error handling for division by zero #255

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13 changes: 13 additions & 0 deletions src/com/jwetherell/algorithms/mathematics/Division.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,12 +2,21 @@

public class Division {

//Function which checks if the divisor is equal to 0 to avoid division by zero.
private static void checkDivisor(int b) {
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Function which takes in the divisor as a parameter.

if (b == 0) {
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Checks if the divisor is 0 and then throws an IllegalArgumentException if true.

throw new IllegalArgumentException("Divisor cannot be zero.");
}
}

public static final long division(int a, int b) {
checkDivisor(b);
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Run the checkDivisor function and send the divisor as the parameter in every function that does division

long result = ((long) a) / ((long) b);
return result;
}

public static final long divisionUsingLoop(int a, int b) {
checkDivisor(b);
int absA = Math.abs(a);
int absB = Math.abs(b);

Expand All @@ -22,6 +31,7 @@ public static final long divisionUsingLoop(int a, int b) {
}

public static final long divisionUsingRecursion(int a, int b) {
checkDivisor(b);
int absA = Math.abs(a);
int absB = Math.abs(b);

Expand All @@ -38,6 +48,7 @@ public static final long divisionUsingRecursion(int a, int b) {
}

public static final long divisionUsingMultiplication(int a, int b) {
checkDivisor(b);
int absA = Math.abs(a);
int absB = Math.abs(b);

Expand All @@ -55,6 +66,7 @@ public static final long divisionUsingMultiplication(int a, int b) {
}

public static final long divisionUsingShift(int a, int b) {
checkDivisor(b);
int absA = Math.abs(a);
int absB = Math.abs(b);
int tempA, tempB, counter;
Expand All @@ -76,6 +88,7 @@ public static final long divisionUsingShift(int a, int b) {
}

public static final long divisionUsingLogs(int a, int b) {
checkDivisor(b);
long absA = Math.abs(a);
long absB = Math.abs(b);
double logBase10A = Math.log10(absA);
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