Tag Archives: Function

C program to convert uppercase to lowercase and vice versa in file

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Write a C program to convert uppercase to lowercase and vice versa in file. How to convert uppercase characters to lowercase and vice versa in a file in C programming. Logic to convert uppercase characters to lowercase and vice versa in C program.

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C program to multiply two matrix using pointers

Write a C program to multiply two matrix using pointers. How to input and multiply two matrix using pointer in C programming. Logic to multiply two matrix using pointer in C.

Example

Input

Input elements of matrix1:
10 20 30
40 50 60
70 80 90
Input elements of matrix2:
1 2 3
4 5 6
7 8 9

Output

Product of matrices is :
300 360 420
660 810 960
1020 1260 1500

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How to access two dimensional array using pointers in C programming?

How to access two dimensional array using pointers in C programming? Write a C program to input and print elements of a two dimensional array using pointers and functions.

Example

Input

Input elements in 3x3 matrix: 
1 2 3
4 5 6
7 8 9

Output

Elements of 3x3 matrix: 
1 2 3
4 5 6
7 8 9

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How to pass and return array from function in C?

Functions makes our program modular and maintainable. Big applications can have hundreds of functions.

Array is a data structure to store homogeneous collection of data. Arrays are equally important as functions. In programming we often use arrays and functions together.

Here in this post I will explain how to pass and return array from function in C programming.

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C program to sort an array using pointers

Write a C program to input elements in an array and sort array using pointers. How to sort an array in ascending or descending order using function pointers in C programming. Logic to sort an array using pointers in program.

Example

Input

Input array elements: 10 -1 0 4 2 100 15 20 24 -5

Output

Array in ascending order: -5, -1, 0, 2, 4, 10, 15, 20, 24, 100,
Array in descending order: 100, 24, 20, 15, 10, 4, 2, 0, -1, -5,

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C program to search element in array using pointers

Write a C program to input elements in array and search an element in array using pointers. How to search an element in array using pointers in C programming. Logic to search an element in array using pointers in C program.

Example

Input

Input array elements: 10 20 30 40 50 60 70 80 90 100
Input element to search: 25

Output

25 does not exists in array.

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Variable length arguments (var-args) in C

In the journey of learning C functions, we learned many concepts related to functions. We learned to define our own function, passing arguments to a function, returning value from a function, recursive function etc. In this chapter, I will talk something interesting about passing variable length arguments to a function.

Have you ever wondered how functions like printf() and scanf() works? As they readily accept any number of arguments passed. You can say -

printf("Learning at Codeforwin");                // Single argument
printf("Codeforwin was founded in %d", 2015);    // Two arguments
printf("Today is %d-%d-%d", 19, 9, 2017);        // Four arguments

In real you can pass n number of arguments to printf(), but how it works?

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Recursion in C programming

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.

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