C++ bootcamp
Question on the left. Your C++ on the right. Check it.
Each lab is one problem: read the spec, write a solution, press Run, then Check. Hints stay closed. The correct code is there when you need it. g++ grades stdout against hidden tests.
50 labs · 26 easy · 24 medium · progress stays in this browser.
- Read the questionInput, output, and a short example. Same shape as a classroom worksheet.
- Write C++, then RunThe starter is a skeleton. Change it, then see what happens.
- Check, or open a hintCheck runs every test. Hint and correct code stay folded until you open them.
Labs
Work them in order, or jump ahead when you are ready.
- 01easy
Hello, C++
Output · 5 min
Open lab - 02easy
Sum two numbers
Input · 8 min
Open lab - 03easy
Celsius to Fahrenheit
Math · 8 min
Open lab - 04easy
Even or odd
If Else · 8 min
Open lab - 05easy
Letter grade
If Else · 10 min
Open lab - 06easy
Largest of three
If Else · 10 min
Open lab - 07easy
Times table
For Loop · 10 min
Open lab - 08easy
Squares on one line
For Loop · 10 min
Open lab - 09easy
Sum 1 to n
While Loop · 10 min
Open lab - 10medium
FizzBuzz
For Loop · 12 min
Open lab - 11medium
Fibonacci sequence
For Loop · 12 min
Open lab - 12medium
Count the words
Strings · 10 min
Open lab - 13easy
Count the vowels
Strings · 10 min
Open lab - 14easy
Reverse a word
Strings · 10 min
Open lab - 15medium
Palindrome check
Strings · 12 min
Open lab - 16medium
Maximum in a vector
Vectors · 12 min
Open lab - 17medium
Average of a vector
Vectors · 12 min
Open lab - 18medium
Second largest
Sets · 12 min
Open lab - 19medium
Unique and sorted
Sets · 10 min
Open lab - 20medium
Word frequency
Maps · 15 min
Open lab - 21medium
Factorial function
Functions · 12 min
Open lab - 22easy
Leap year
If Else · 10 min
Open lab - 23easy
Sum of digits
While Loop · 10 min
Open lab - 24easy
Countdown
For Loop · 8 min
Open lab - 25easy
Skip multiples of 3
Break Continue · 10 min
Open lab - 26medium
Prime check
Functions · 12 min
Open lab - 27medium
Greatest common divisor
Functions · 12 min
Open lab - 28easy
Star triangle
Nested Loops · 10 min
Open lab - 29medium
Anagram check
Strings · 12 min
Open lab - 30medium
Safe division
Exceptions · 12 min
Open lab - 31medium
Rectangle class
Classes · 15 min
Open lab - 32medium
Swap with references
References · 12 min
Open lab - 33medium
Power by recursion
Recursion · 12 min
Open lab - 34medium
Keep the evens
Lambdas · 12 min
Open lab - 35medium
Sort descending
Algorithms · 10 min
Open lab - 36medium
Matrix sum
2D Arrays · 12 min
Open lab - 37medium
Linear search
Vectors · 12 min
Open lab - 38easy
Reverse a vector
Vectors · 8 min
Open lab - 39medium
Collatz steps
While Loop · 12 min
Open lab - 40easy
Min with a ternary
Ternary · 8 min
Open lab - 41medium
Map lookup
Maps · 12 min
Open lab - 42easy
Day of the week
Switch · 10 min
Open lab - 43easy
Count the digits
Strings · 8 min
Open lab - 44easy
Filter even values
Vectors · 10 min
Open lab - 45easy
Min and max
Vectors · 8 min
Open lab - 46easy
Days in a month
Switch · 10 min
Open lab - 47easy
Absolute difference
Math · 8 min
Open lab - 48easy
Median of three
If Else · 10 min
Open lab - 49easy
Title case
Strings · 12 min
Open lab - 50medium
Power of two?
Bitwise · 10 min
Open lab