Write following programs in C language. Prepare logic and write, edit program in code block IDE or any IDE of your choice, compile program and check it for successful execution.

Write a C program that demonstrate use of user define function in C language. Create a function name for calculating square of given number. Program will receive an integer number and pass it to function and function will return square of number. Display number and its value of square.

Write a C program that demonstrate use of array in C language. Create an integer array for 10 elements. Program will receive 10 different integer value and store it in Array. Use FOR or While loop. Display only value of even element members of array.

Write a C program that demonstrate use of pointers and array in C language. Declare a string using Array of CHAR data type and store string String of Characters. Create a function that display string. Pass string pointer as Passing Argument to function by reference concept. (pass pointer to array to function).