v0.40: Create exercises. Challenge the community.

prime_factors

Your mission

Write a program that prints the prime factorization of a positive integer.

See it in action

./prime_factors 12

Expected result

2*2*3

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one positive integer argument.
Print the prime factors in ascending order, separated by *.
Repeated prime factors must appear as many times as they divide the number.
If the argument is 1, print 1 followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
You may use printf and atoi.

More examples

./prime_factors 36

Expected result

2*2*3*3

./prime_factors 1

Expected result

./prime_factors

Expected result

wrong number of arguments

Constraints

Expected files

prime_factors.c

Allowed functions

printfatoi

prime_factors

Functions

Your mission

Write a program that prints the prime factorization of a positive integer.

See it in action

./prime_factors 12

Expected result

2*2*3

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one positive integer argument.
Print the prime factors in ascending order, separated by *.
Repeated prime factors must appear as many times as they divide the number.
If the argument is 1, print 1 followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
You may use printf and atoi.

More examples

./prime_factors 36

Expected result

2*2*3*3

./prime_factors 1

Expected result

./prime_factors

Expected result

wrong number of arguments

Constraints

Expected files

prime_factors.c

Allowed functions

printfatoi

Tests

Run the tests to grade your code

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

Build

01No argumentsWaiting

021 is printed as-isWaiting

03Prime factorization of 12Waiting

04Prime factorization of 36Waiting

05Prime factorization of 60Waiting

prime_factors

Your mission

Write a program that prints the prime factorization of a positive integer.

See it in action

./prime_factors 12

Expected result

2*2*3

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one positive integer argument.
Print the prime factors in ascending order, separated by *.
Repeated prime factors must appear as many times as they divide the number.
If the argument is 1, print 1 followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
You may use printf and atoi.

More examples

./prime_factors 36

Expected result

2*2*3*3

./prime_factors 1

Expected result

./prime_factors

Expected result

wrong number of arguments

Constraints

Expected files

prime_factors.c

Allowed functions

printfatoi

v0.40: Create exercises. Challenge the community.

Meet Studio →

prime_factors

Functions

Your mission

Write a program that prints the prime factorization of a positive integer.

See it in action

./prime_factors 12

Expected result

2*2*3

Your checklist

For your own tracking. Tests grade your code.

The program expects exactly one positive integer argument.
Print the prime factors in ascending order, separated by *.
Repeated prime factors must appear as many times as they divide the number.
If the argument is 1, print 1 followed by a newline.
If the program does not receive exactly one argument (argc must be 2), print wrong number of arguments followed by a newline.
You may use printf and atoi.

More examples

./prime_factors 36

Expected result

2*2*3*3

./prime_factors 1

Expected result

./prime_factors

Expected result

wrong number of arguments

Constraints

Expected files

prime_factors.c

Allowed functions

printfatoi

Tests

Run the tests to grade your code

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

Build

01No argumentsWaiting

021 is printed as-isWaiting

03Prime factorization of 12Waiting

04Prime factorization of 36Waiting

05Prime factorization of 60Waiting