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added way to send error for when dividing by zero #248

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added way to send error for when dividing by zero #248

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11 changes: 11 additions & 0 deletions .project
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Original file line number Diff line number Diff line change
Expand Up @@ -14,4 +14,15 @@
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
<filteredResources>
<filter>
<id>1730486626683</id>
<name></name>
<type>30</type>
<matcher>
<id>org.eclipse.core.resources.regexFilterMatcher</id>
<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
</matcher>
</filter>
</filteredResources>
</projectDescription>
22 changes: 18 additions & 4 deletions src/com/jwetherell/algorithms/mathematics/Division.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,14 +3,19 @@
public class Division {

public static final long division(int a, int b) {
if (b == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
long result = ((long) a) / ((long) b);
return result;
}

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

if (absB == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
long temp = absA;
long result = 0;
while (temp >= 0) {
Expand All @@ -24,7 +29,9 @@ public static final long divisionUsingLoop(int a, int b) {
public static final long divisionUsingRecursion(int a, int b) {
int absA = Math.abs(a);
int absB = Math.abs(b);

if (absB == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
long result = 1;
int diff = absA - absB;
if (diff > 0 && diff <= 1) {
Expand All @@ -40,7 +47,9 @@ public static final long divisionUsingRecursion(int a, int b) {
public static final long divisionUsingMultiplication(int a, int b) {
int absA = Math.abs(a);
int absB = Math.abs(b);

if (absB == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
int temp = absB;
int counter = 0;
while (temp <= absA) {
Expand All @@ -58,7 +67,9 @@ public static final long divisionUsingShift(int a, int b) {
int absA = Math.abs(a);
int absB = Math.abs(b);
int tempA, tempB, counter;

if (absB == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
long result = 0L;
while (absA >= absB) {
tempA = absA >> 1; // Right shift "a"
Expand All @@ -78,6 +89,9 @@ public static final long divisionUsingShift(int a, int b) {
public static final long divisionUsingLogs(int a, int b) {
long absA = Math.abs(a);
long absB = Math.abs(b);
if (absB == 0) {
throw new IllegalArgumentException("Divisor cannot be zero.");
}
double logBase10A = Math.log10(absA);
double logBase10B = Math.log10(absB);
double powOf10 = Math.pow(10, (logBase10A - logBase10B));
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