Beta 0.35.0
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0 / 5 modules
Structure your code
0 / 4 modules
Text
0 / 6 modules
Memory
0 / 3 modules
Your own types
0 / 5 modules
The machine
0 / 4 modules
The system
0 / 1 modules
First program
0 / 7
Read the error
0 / 5
Types and values
0 / 7
Conditions and loops
0 / 7
Command line
0 / 6
Functions
0 / 5
Recursion
0 / 6
Pointers
0 / 7
Arrays and matrices
0 / 7
Characters and ASCII
0 / 4
Strings: walking and…
0 / 6
Writing text without…
0 / 4
Words and tokens
0 / 4
Transforming text
0 / 5
Numbers and bases
0 / 6
Dynamic memory
0 / 5
Bytes and raw memory
0 / 4
Memory safety
0 / 6
Structs, unions, enu…
0 / 6
Headers and the prep…
0 / 3
Linked lists
0 / 4
Stacks, queues, trees
0 / 3
Generic code
0 / 3
Bits and representat…
0 / 4
Sorting and searching
0 / 7
Files and streams
0 / 3
Parsing and formats
0 / 4
Processes and signals
0 / 4
C foundations checkpo…
5 tasks · not ready
Code structure checkp…
4 tasks · not ready
Text handling checkpo…
5 tasks · not ready
Memory safety checkpo…
3 tasks · not ready
Types and data struct…
4 tasks · not ready
Machine model checkpo…
4 tasks · not ready
Processes and signals…
2 tasks · not ready
Chapter checkpoints
100%
Fit
Command line
Reading `argc` and `argv`, and reporting a bad invocation.
Required exercises
0 / 6
6 required exercises
·
1 optional
·
Difficulty 2 to 3
·
0 / 104 XP
Exercises · 7
Exercise
Level
XP
Status
arg_count
Print how many command-line arguments were provided
+12
New
first_arg
Print the first command-line argument
+12
New
last_arg
Print the last command-line argument followed by a newline
+12
New
args_rev
Print each CLI argument on its own line, starting from the last
+12
New
argv_sum
Sum all integer arguments and print the result
+16
New
exit-status
Print the sum of the integer arguments and report every failure through the exit status
+16
New
calc
Optional
Evaluate a simple arithmetic expression passed as three arguments
+24
New
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