34 RESULTS · 21–34
Matches for “C”
Lesson
C While Loop
Repeat work while a condition remains true, change state each pass, and keep an obvious exit.
Exercise
Count vowels in a C string
Return the number of English vowels in a null-terminated string. Count upper- and lower-case letters, and treat a null pointer as an empty string.
Course
Learn C Programming
Learn C syntax, variables, data types, operators, conditions, loops, functions, arrays, strings, pointers, structures, dynamic memory, files, and a project.
Page
Free programming courses
Browse HTML, CSS, JavaScript, Python, C, C++, SQL and Git tutorials.
Exercise
Copy a string with a capacity contract
Write copy_string that copies source into destination when capacity is non-zero, always terminates the destination, and reports failure if the source will not fit.
Exercise
Deduplicate a sorted integer array
Remove duplicates in-place from an ascending integer array and return the number of unique values. The retained prefix must preserve ascending order.
Exercise
Grow a dynamic integer buffer
Implement append_int so a heap-backed buffer grows geometrically, checks multiplication overflow, and leaves the original allocation untouched if realloc fails.
Exercise
Parse one CSV inventory record
Parse a simple inventory record in the form id,name,quantity into a struct. Reject missing fields, extra commas, an empty name, and a quantity outside 0..100000.
Exercise
Validate a command-line integer
Implement parse_quantity using strtol. Accept only a complete base-10 integer in range 0..100000, reject whitespace-only or trailing characters, and report success through the return value.
Exercise
Audit a multi-file build
Given app.c, inventory.c, inventory.h, and Makefile, explain and write the dependency rules needed so changing inventory.h recompiles both relevant object files before linking.
Exercise
Find the maximum safely
Implement find_max to write the greatest array value into out. Return 1 on success and 0 when the array is empty, the pointer is null, or out is null.
Exercise
Push into a bounded ring queue
Implement queue_push for a fixed-capacity circular queue. Return 0 when the queue is full or invalid; otherwise store the value, advance tail with wraparound, and increase size.
Exercise
Sum an integer array safely
Implement sum_array so it returns the sum of exactly length elements. The caller owns the array; handle a null pointer or zero length without dereferencing it.
Exercise
Swap two integers through pointers
Implement swap_ints so the caller's two integer variables exchange values. It must do nothing when either pointer is null.