v0.40: Create exercises. Challenge the community.

big_uint

Your mission

Implement big_uint, a C++98 class that stores unsigned integers larger than native integer types.

See it in action

std::cout << (big_uint(37) << 3) << "\n";

Expected result

Your checklist

For your own tracking. Tests grade your code.

Create big_uint.hpp and big_uint.cpp.
Expose a class named big_uint with canonical construction, copy, assignment, and destruction.
A default-constructed value represents zero.
A value can be constructed from an unsigned int.
Print values in base 10 with operator<<, without leading zeroes.
Support +, +=, prefix ++, and postfix ++.
Support decimal digit shifts with <<, >>, <<=, and >>= for both unsigned int and big_uint shift counts.
A left digit shift appends zeroes; a right digit shift removes decimal digits and becomes zero when the shift is longer than the number.
Support ==, !=, <, <=, >, and >=.

More examples

std::cout << (big_uint(90210) >> 2) << "\n";

Expected result

Constraints

Expected files

big_uint.hppbig_uint.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

stringdecimal storage

big_uint

Your mission

Implement big_uint, a C++98 class that stores unsigned integers larger than native integer types.

See it in action

std::cout << (big_uint(37) << 3) << "\n";

Expected result

Your checklist

For your own tracking. Tests grade your code.

Create big_uint.hpp and big_uint.cpp.
Expose a class named big_uint with canonical construction, copy, assignment, and destruction.
A default-constructed value represents zero.
A value can be constructed from an unsigned int.
Print values in base 10 with operator<<, without leading zeroes.
Support +, +=, prefix ++, and postfix ++.
Support decimal digit shifts with <<, >>, <<=, and >>= for both unsigned int and big_uint shift counts.
A left digit shift appends zeroes; a right digit shift removes decimal digits and becomes zero when the shift is longer than the number.
Support ==, !=, <, <=, >, and >=.

More examples

std::cout << (big_uint(90210) >> 2) << "\n";

Expected result

Constraints

Expected files

big_uint.hppbig_uint.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

stringdecimal storage

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Default constructor yields 0Waiting

02Constructs from an unsigned intWaiting

03Copy constructor duplicates the valueWaiting

04Assignment copies the valueWaiting

05operator+ adds two valuesWaiting

06operator+ carries across digitsWaiting

07operator+= accumulates in placeWaiting

08prefix ++ returns the incremented valueWaiting

09postfix ++ returns the old value, then incrementsWaiting

10operator<< shifts digits left (multiplies by 10^n)Waiting

11operator>> shifts digits right (divides by 10^n)Waiting

12operator<<= shifts digits left in placeWaiting

13operator>>= shifts digits right in placeWaiting

14Addition carries through a long digit chainWaiting

15operator< is true when strictly smallerWaiting

16operator<= is true when equalWaiting

17operator> is true when strictly greaterWaiting

18operator>= is false when strictly smallerWaiting

19operator== is true for equal valuesWaiting

20operator!= is false for equal valuesWaiting

21Right shift past all digits becomes 0Waiting

big_uint

Your mission

Implement big_uint, a C++98 class that stores unsigned integers larger than native integer types.

See it in action

std::cout << (big_uint(37) << 3) << "\n";

Expected result

Your checklist

For your own tracking. Tests grade your code.

Create big_uint.hpp and big_uint.cpp.
Expose a class named big_uint with canonical construction, copy, assignment, and destruction.
A default-constructed value represents zero.
A value can be constructed from an unsigned int.
Print values in base 10 with operator<<, without leading zeroes.
Support +, +=, prefix ++, and postfix ++.
Support decimal digit shifts with <<, >>, <<=, and >>= for both unsigned int and big_uint shift counts.
A left digit shift appends zeroes; a right digit shift removes decimal digits and becomes zero when the shift is longer than the number.
Support ==, !=, <, <=, >, and >=.

More examples

std::cout << (big_uint(90210) >> 2) << "\n";

Expected result

Constraints

Expected files

big_uint.hppbig_uint.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

stringdecimal storage

big_uint

Your mission

Implement big_uint, a C++98 class that stores unsigned integers larger than native integer types.

See it in action

std::cout << (big_uint(37) << 3) << "\n";

Expected result

Your checklist

For your own tracking. Tests grade your code.

Create big_uint.hpp and big_uint.cpp.
Expose a class named big_uint with canonical construction, copy, assignment, and destruction.
A default-constructed value represents zero.
A value can be constructed from an unsigned int.
Print values in base 10 with operator<<, without leading zeroes.
Support +, +=, prefix ++, and postfix ++.
Support decimal digit shifts with <<, >>, <<=, and >>= for both unsigned int and big_uint shift counts.
A left digit shift appends zeroes; a right digit shift removes decimal digits and becomes zero when the shift is longer than the number.
Support ==, !=, <, <=, >, and >=.

More examples

std::cout << (big_uint(90210) >> 2) << "\n";

Expected result

Constraints

Expected files

big_uint.hppbig_uint.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

stringdecimal storage

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Default constructor yields 0Waiting

02Constructs from an unsigned intWaiting

03Copy constructor duplicates the valueWaiting

04Assignment copies the valueWaiting

05operator+ adds two valuesWaiting

06operator+ carries across digitsWaiting

07operator+= accumulates in placeWaiting

08prefix ++ returns the incremented valueWaiting

09postfix ++ returns the old value, then incrementsWaiting

10operator<< shifts digits left (multiplies by 10^n)Waiting

11operator>> shifts digits right (divides by 10^n)Waiting

12operator<<= shifts digits left in placeWaiting

13operator>>= shifts digits right in placeWaiting

14Addition carries through a long digit chainWaiting

15operator< is true when strictly smallerWaiting

16operator<= is true when equalWaiting

17operator> is true when strictly greaterWaiting

18operator>= is false when strictly smallerWaiting

19operator== is true for equal valuesWaiting

20operator!= is false for equal valuesWaiting

21Right shift past all digits becomes 0Waiting

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