Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles by Bhanu Priya
Page 51 of 107
How to pass an entire structure as an argument to function in C?
In C programming, structures can be passed to functions in three ways. Here we'll focus on passing an entire structure as an argument to a function, where the complete structure variable is passed by value. Syntax return_type function_name(struct structure_name variable_name); When passing an entire structure as an argument − The structure variable name is given as argument in the function call It is collected in another structure variable in the function header A complete copy of the structure is created, which uses additional memory Example 1: Basic Structure Passing This ...
Read MoreHow to pass the individual members as arguments to function using structure elements?
In C programming, there are three ways to pass structure data to functions. One of the most basic approaches is passing individual structure members as separate arguments to a function. This method treats each structure member as an independent variable in the function call. Syntax // Function declaration returnType functionName(dataType1 member1, dataType2 member2, ...); // Function call functionName(structVariable.member1, structVariable.member2, ...); How It Works Each member is passed as a separate argument in the function call Members are collected independently as ordinary variables in the function parameters Changes made to parameters inside the ...
Read MoreExplain the dynamic memory allocation of pointer to structure in C language
Dynamic memory allocation of pointer to structure in C allows us to allocate memory for structures at runtime using functions like malloc(), calloc(), or realloc(). This approach is essential when the number of structures needed is not known at compile time. Pointer to structure holds the address of the entire structure and is used to create complex data structures such as linked lists, trees, and graphs. The members of the structure can be accessed using the arrow operator (->). Syntax struct tagname *ptr; ptr = (struct tagname*) malloc(n * sizeof(struct tagname)); Declaration and Access ...
Read MoreExplain the concept of an array within a structure in C programming
An array within a structure in C programming is a powerful feature that allows you to group related data elements together. When you declare an array as a member of a structure, you can store multiple values of the same data type within a single structure variable. Syntax struct structure_name { datatype member1; datatype array_name[size]; datatype member2; }; General Structure Declaration The basic syntax for declaring a structure is − struct tagname { datatype member1; ...
Read MoreC program demonstrating the concepts of strings using Pointers
In C programming, strings can be effectively manipulated using pointers. A string is essentially an array of characters terminated by a null character ('\0'). When we use pointers with strings, we can access and manipulate individual characters efficiently. Syntax char *pointer_name = "string_literal"; char *array_of_pointers[] = {"string1", "string2", "string3"}; String Declaration and Initialization Strings can be declared and initialized in multiple ways − Using character array: char string[50]; Using character constants: char string[10] = {'H', 'e', 'l', 'l', 'o', '\0'}; Using string literals: char string[10] = "Hello"; Using pointer to string: char ...
Read MoreWhat is strncmp() Function in C language?
The C library function strncmp() compares at most the first n characters of two strings lexicographically. It returns an integer value indicating the relationship between the strings based on the first n characters. Syntax int strncmp(const char *str1, const char *str2, size_t n); Parameters str1 − First string to be compared str2 − Second string to be compared n − Maximum number of characters to compare Return Value 0 − If the first n characters of both strings are equal Positive value − If str1 is lexicographically greater than ...
Read MoreWhat is strncat() Function in C language?
In C, the strncat() function is used to concatenate a specified number of characters from one string to the end of another string. It appends at most n characters from the source string to the destination string. Syntax char *strncat(char *dest, const char *src, size_t n); Parameters dest − Pointer to the destination string where characters will be appended src − Pointer to the source string from which characters will be copied n − Maximum number of characters to append from source Return Value The function returns a pointer to ...
Read MoreWhat is pass by value in C language?
Pass by value is a parameter passing mechanism in C programming where the actual value of arguments is copied to the function's formal parameters. When you pass variables to a function using pass by value, the function receives copies of the values, not the original variables themselves. Syntax return_type function_name(data_type parameter1, data_type parameter2, ...); How Pass by Value Works When using pass by value: The function receives copies of the argument values Changes made to parameters inside the function do not affect the original variables Memory is allocated separately for function parameters ...
Read MoreWhat is a two-dimensional array in C language?
A two-dimensional array in C is a collection of elements arranged in rows and columns, forming a matrix-like structure. It is essentially an array of arrays, where each element is identified by two indices: row index and column index. Syntax datatype array_name[row_size][column_size]; Example: int matrix[3][4]; declares a 2D array with 3 rows and 4 columns. Memory Layout Two-dimensional arrays are stored in row-major order in memory. Here's how a 2x3 array looks − 2D Array: int a[2][3] a[0][0] ...
Read MoreExplain nested switch case in C language
Nested switch case in C allows you to place one switch statement inside another switch statement. This technique is useful when you need to perform multi-level decision-making based on different variables or conditions. Syntax switch (outer_expression) { case value1: switch (inner_expression) { case inner_value1: // statements ...
Read More