Write a C program to list all files in a directory. How to list all files in a directory recursively. How to use readdir() function to list all files in a directory recursively. Logic to list all files and sub-directories of a directory in C programming. How to use opendir(), readdir() and closedir() library functions.
Recursion is expressing an entity in terms of itself. In C programming, recursion is achieved using functions known as recursive function. Recursive functions are very powerful in solving and expressing complex mathematical problems.
Until now, we called a function from another function. However, C language allows a function to call itself known as Recursive function.
Write a C program to find maximum and minimum elements in an array using recursion. How to find maximum and minimum element in an array using recursion in C programming. Logic to find find maximum or minimum elements in array in C programming.
Example
Input
Size of array: 10 Elements in array: 5, 1, 6, 10, 2, 3, 6, 50, -7, 4
Output
Maximum element = 50 Minimum element = -7
Write a C program to find sum of array elements using recursion. How to find sum of array elements using recursive function in C programming. Logic to find sum of array elements using recursion in C program.
Example
Input
Input size of array: 10 Input array elements: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Output
Sum of array: 55
Write a C program to print all elements of array using recursion. How to display all elements of an array using recursion. Logic to print array elements using recursion in C programming.
Example
Input
Input size: 10 Input elements: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
Output
Array elements: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
A function is a collection of statements grouped together to do some specific task. In series of learning C programming, we already used many functions unknowingly. Functions such as – printf(), scanf(), sqrt(), pow() or the most important the main() function. Every C program has at least one function i.e. the main() function.
Function provides modularity to our program. Dividing a program in different modules makes it easy to maintain, debug and understand the code.
Write a C program to find LCM of two numbers using recursion. How to find LCM of two numbers in C programming using recursion. Logic to find LCM of two numbers using recursion.
Example
Input
Input first number: 12 Input second number: 30
Output
LCM of 12 and 30 = 60
Write a recursive function in C to find GCD (HCF) of two numbers. How to find GCD(Greatest Common Divisor) or HCF(Highest Common Factor) of two numbers using recursion in C program. Logic to find HCF of two numbers using recursion in C programming.
Example
Input
Input first number: 10 Input second number: 15
Output
HCF of 10 and 15 = 5
Write a recursive function in C programming to calculate sum of digits of a number. How to calculate sum of digits of a given number using recursion in C program. Logic to find sum of digits using recursion in C programming.
Example
Input
Input number: 1234
Output
Sum of digits: 10
Write a recursive function in C to check palindrome number. How to check whether a number is palindrome or not using recursion in C program. Logic to check palindrome number using recursion in C programming.
Example
Input
Input number: 121
Output
121 is palindrome