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C Articles
Page 21 of 96
Explain the constant type qualifier in C language
Type qualifiers add special attributes to existing datatypes in C programming language. The const type qualifier is used to make variables read-only, preventing their modification after initialization. Type Qualifiers in C const volatile restrict Read-only variables Prevents compiler ...
Read MoreDecimal to Binary conversion using C Programming
Decimal to binary conversion is a fundamental concept in computer programming. In C, we can convert decimal numbers to their binary representation using simple mathematical operations and functions. Syntax long decimalToBinary(int decimal_number); Method 1: Using Function with Mathematical Approach This method uses modulo and division operations to extract binary digits and build the binary number − #include long decimalToBinary(int dno) { long bno = 0, rem, f = 1; while (dno != 0) { ...
Read MoreC Program to print the sum of boundary elements of a matrix
In C programming, finding the sum of boundary elements of a matrix involves identifying elements that are on the first row, last row, first column, or last column. Boundary elements form the outer edge of the matrix. Syntax for(i = 0; i < rows; i++){ for(j = 0; j < cols; j++){ if(i == 0 || i == rows-1 || j == 0 || j == cols-1){ // This is a boundary element ...
Read MoreC program to calculate power of a given number
In C programming, calculating the power of a number means multiplying the base number by itself for a specified number of times (exponent). For example, 34 = 3 × 3 × 3 × 3 = 81. We can implement this using loops or the built-in pow() function. Syntax // Manual calculation using loop result = base^exponent // Using pow() function #include double pow(double base, double exponent); Method 1: Using While Loop This approach uses a while loop to multiply the base value repeatedly − #include int main() { ...
Read MoreC Program to find minimum occurrence of character in a string
In C programming, finding the minimum occurrence of a character in a string involves counting the frequency of each character and then determining which character appears the least number of times. Syntax char string[SIZE]; int frequency[CHARS]; // Count frequency of each character // Find character with minimum frequency String Declaration and Initialization Before finding minimum occurrence, let's understand string basics − Declaration: char stringname[size]; For example − char string[50]; creates a string of length 50 characters. Initialization: Using single character constants − char string[10] ...
Read MoreWhat is strrev() Function in C language?
In C programming, the strrev() function is used to reverse a string in-place. However, strrev() is not part of the standard C library — it is a Microsoft-specific extension found in some compilers. For portable code, we need to implement string reversal manually. Syntax char* strrev(char* str); Where str is the string to be reversed. The function returns a pointer to the reversed string. Example 1: Manual String Reversal Using Two Pointers Since strrev() is not standard, here's how to reverse a string using a custom function − #include #include ...
Read MoreExplain scope rules related to the functions in C language
Scope rules in C programming determine the accessibility, lifetime, and boundary of variables within different parts of a program. Understanding scope is crucial for proper variable management and avoiding naming conflicts. Syntax // Local variable declaration return_type function_name() { data_type local_variable; // Local scope } // Global variable declaration data_type global_variable; // Global scope return_type function_name() { // Function body } Function Scope Rules Scope rules related to functions follow these principles − Local Variables: Variables declared within a ...
Read MoreWhat are the predefined functions in C language?
In C programming, functions are classified into two main types − Predefined functions (Library functions) User-defined functions Predefined functions are pre-written functions available in C standard libraries. They provide ready-to-use functionality for common programming tasks, helping developers write efficient and error-free code. Syntax #include return_type function_name(parameters); Key Features of Predefined Functions Already defined in system libraries Tested and optimized for performance Reduce development time and effort Require appropriate header file inclusion Follow standard syntax and conventions Common Mathematical Functions The math.h library provides various mathematical ...
Read MoreWhat are different pointer operations and problems with pointers in C language?
A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address. Syntax datatype *pointer_name; Where datatype is the type of variable the pointer will point to, and pointer_name is the name of the pointer variable. Memory Representation Consider the following statement − int qty = 179; 179 qty Address: 1000 ...
Read MoreHow to print the range of numbers using C language?
In C programming, finding the range of a given number means determining the interval of 10 consecutive numbers within which that number falls. For example, if the number is 45, it falls in the range 40-50. Syntax lower = (n/10) * 10; upper = lower + 10; How It Works The logic to find the range uses integer division to extract the tens digit − Lower bound: (n/10) * 10 removes the units digit and gives the nearest lower multiple of 10 Upper bound: lower + 10 gives the next multiple of ...
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