Program to demonstrate the ‘fgets’ function. The program will count the number of lines in a file. This is a function of the UNIX command ‘wc’. Read more about C Programming Language . /************************************************************ You can use all the programs on www.c-program-example.com* for personal and learning purposes. For permissions to use the* programs for commercial …
Combinations and permutations in C are computed using two related formulas. A combination C(n, r) counts the number of ways to choose r items from n items where order does not matter. A permutation P(n, r) counts the number of ways to arrange r items chosen from n items where order matters. C(n, r) = …
C Program to check the given number is Armstrong number or not?. Armstrong number is a number that is the sum of its own digits each raised to the power of the number of digits. Example: 153 = 1^3 + 5^3 + 3^3. Read more about C Programming Language . /************************************************************ You can use all …
C preprocessor directives are instructions that run before compilation. The preprocessor reads your source file, processes every line that starts with #, and hands the result to the compiler. Understanding them well means smaller code, safer constants, conditional compilation for different platforms, and header files that include safely more than once. Object-Like Macros — #define …
The ctype.h header provides a set of functions for testing and converting individual characters. Each function takes an int (the ASCII value of a character) and returns a non-zero value (true) if the character belongs to a certain class. They are used in parsers, tokenizers, input validation, and any code that processes text character by …
The extern keyword in C declares that a variable or function exists — but is defined somewhere else. It tells the compiler “trust me, this symbol is defined in another translation unit; the linker will resolve it.” Understanding extern is essential for any multi-file C program, and confusing declaration with definition is one of the …