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C#Getting Started

Calculate a simple total

C#: Multiply a unit price by a quantity, then add a delivery fee.

C#✓ Tested
JavaGetting Started

Calculate a simple total

Java: Multiply a unit price by a quantity, then add a delivery fee.

Java✓ Tested
JavaScriptGetting Started

Calculate a simple total

JavaScript: Multiply a unit price by a quantity, then add a delivery fee.

JavaScript✓ Tested
TypeScriptGetting Started

Calculate a simple total

TypeScript: Multiply a unit price by a quantity, then add a delivery fee.

TypeScript✓ Tested
C++Getting Started

Calculate a simple total

C++: Multiply a unit price by a quantity, then add a delivery fee.

C++✓ Tested
CGetting Started

Calculate a simple total

C: Multiply a unit price by a quantity, then add a delivery fee.

C✓ Tested
CSmall algorithms & bit operations

Calculate an average without integer division truncation

C: Accumulate into double and divide by the nonzero number of readings.

C✓ Tested
GitGetting Started

Check a change for whitespace problems

Git: Check a change for whitespace problems inside the disposable repository created by the input setup.

Git✓ Tested
CDynamic memory & ownership

Check an array allocation size before multiplying

C: Compare the requested element count against SIZE_MAX divided by element size.

C✓ Tested
Linux CommandsSystem information

Check memory usage

Show memory and swap totals in human-readable units. The available column estimates memory usable by new applications.

memory✓ Tested
JavaDates & time zones

Check the Gregorian leap-year rule

Java: Use Year.isLeap rather than checking divisibility by four alone.

Java✓ Tested
Linux CommandsArchive integrity & packaging

Check the integrity of a gzip stream

Linux Commands: Use gzip -t to verify a compressed file without extracting it.

Linux Commands✓ Tested