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C Articles
Page 26 of 96
Explain about link and definition section in C language
In C programming, the link section and definition section are parts of preprocessor directives that provide instructions to the compiler before the actual compilation begins. The link section uses #include directives to include header files containing function declarations and definitions from system libraries. The definition section uses #define directives to create symbolic constants and macros. Syntax #include // Link section #define CONSTANT_NAME value // Definition section Link Section The link section tells the compiler which header files to include. This allows access to predefined functions and their ...
Read MoreC program to handle integer data files using file concepts
In C, file handling allows us to work with different types of data including integers. This program demonstrates how to read integer data from one file and separate odd and even numbers into different files using file concepts. Syntax FILE *fopen(const char *filename, const char *mode); int putw(int w, FILE *stream); int getw(FILE *stream); int fclose(FILE *stream); Approach The program follows these steps − Create a DATA file and write integers to it Read integers from DATA file Separate odd numbers into ODD file and even numbers into EVEN file Display contents ...
Read MoreExplain the pre-processor directives in C language
The preprocessor is a tool that processes the source code before it passes through the compiler. It works as an initial phase of compilation where it operates under the control of different command lines or directives. Syntax #directive_name [parameters] Pre-processor Directives in C Preprocessor directives are placed in the source program before the main function, begin with the symbol "#" in column one and do not require a semicolon at the end. The commonly used preprocessor directives are − #define #undef #include #ifdef #endif #if #else The preprocessor directives ...
Read MoreC program to display the prime numbers in between two intervals
In C programming, finding prime numbers between two intervals is a common problem that involves checking each number in the range for primality. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Syntax for(i = start + 1; i < end; i++) { flag = 0; for(j = 2; j
Read MoreFind the sum of first and last digit for a number using C language
In C programming, finding the sum of the first and last digit of a number involves extracting these digits using modulus and division operations. The last digit is obtained using modulus 10, while the first digit is found by repeatedly dividing the number by 10. Syntax int lastDigit = number % 10; while(number > 9) { number = number / 10; } int firstDigit = number; int sum = firstDigit + lastDigit; Algorithm The algorithm to find the sum of first and last digit is as follows − ...
Read MoreExplain the different sections in C language
A C program follows a structured format with different sections that serve specific purposes. Understanding these sections helps in writing well-organized and maintainable code. Structure of a C Program The complete C program is divided into different sections, which are as follows − Documentation Section − Contains comments about the program like author name, creation or modification date. Information written between /* */ or after // is called a comment line. These lines are ignored by the compiler during compilation. Preprocessor Directives Section − In this section, header files required to execute the program are ...
Read MoreC program to display only the lower triangle elements in a 3x3 2D array
In a 3x3 matrix, the lower triangle consists of elements where the row index is greater than or equal to the column index (i >= j). This includes the main diagonal and all elements below it. Syntax for(i = 0; i < n; i++) { for(j = 0; j < n; j++) { if(i >= j) // Print element at array[i][j] else ...
Read MoreC program to sort an array of ten elements in an ascending order
An array is a group of related data items that are stored with a single name. In this article, we'll learn how to sort an array of ten elements in ascending order using the bubble sort technique. For example, int student[30]; Here, student is an array name which holds 30 collection of data items with a single variable name. Syntax for(i = 0; i < n-1; i++) { for(j = i+1; j < n; j++) { if(arr[i] > arr[j]) { ...
Read MoreExplain monolithic and modular programming in C language
Monolithic and modular programming are two different approaches to writing C programs. The main difference lies in how the code is organized and structured. Monolithic Programming In monolithic programming, the entire program logic is written in a single function, typically the main() function. All the code is placed in one location without breaking it into smaller, manageable parts. Example: Monolithic Approach Here's an example of a monolithic program that performs arithmetic operations − #include int main() { int a = 10, b = 5; ...
Read MoreHow to display the complete text one word per line in C language?
In C, displaying text one word per line involves reading words from a file and printing each word on a separate line. This can be accomplished by using file handling functions to read words and format the output appropriately. Syntax fscanf(file_pointer, "%s", word_buffer); printf("%s", word); Example: Reading Words from File The following program demonstrates how to display text one word per line by reading from a file − Note: This example uses file operations. Create a text file named "input.txt" with some text content before running the program. #include ...
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