The snippet library.

C++Numeric parsing & calculations

Calculate a two-dimensional vector length ↗

C++: hypot avoids unnecessary intermediate overflow in the sum of squares.

C++✓ Tested

C++Numeric parsing & calculations

Check an upper integer bound before adding ↗

C++: For these nonnegative values, compare against the maximum minus the addend first.

C++✓ Tested

C++Numeric parsing & calculations

Find the greatest common divisor with the standard library ↗

C++: std::gcd computes a nonnegative integer common divisor.

C++✓ Tested

C++Numeric parsing & calculations

Find the least common multiple with the standard library ↗

C++: std::lcm combines positive integer periods into a common cycle.

C++✓ Tested

C++Numeric parsing & calculations

Format an integer into a caller-owned buffer ↗

C++: to_chars avoids allocation and reports whether the buffer was large enough.

C++✓ Tested

C++Numeric parsing & calculations

Handle a failed string-to-integer conversion ↗

C++: stoi throws invalid_argument when no conversion can be performed.

C++✓ Tested

C++Numeric parsing & calculations

Parse a complete integer without exceptions ↗

C++: from_chars reports both an error code and the first unconsumed character.

C++✓ Tested

C++Numeric parsing & calculations

Parse a hexadecimal integer with from_chars ↗

C++: An explicit radix controls digit interpretation without a locale dependency.

C++✓ Tested

C++Numeric parsing & calculations

Reject infinite and NaN numeric values ↗

C++: std::isfinite excludes special floating-point values.

C++✓ Tested

C++Numeric parsing & calculations

Round halfway floating-point values away from zero ↗

C++: std::round has an explicit halfway rule different from truncation.

C++✓ Tested