Genarate the output in square (function prototype and decoration)

#include <stdio.h> #include <conio.h> // only needed for getch(); optional void main() { float square(float); float a, b; printf("Enter a number: "); scanf("%f", &a); b = square(a); // call the square function printf("The square is:%f", b); getch (); { // function to calculate square float square(float x) { float result; result = x*x; return(result); }

Output

Explanation of the Square Function Program

This program is used to calculate the square of a number using a user-defined function named square(). The user enters a number, the program sends it to the function, and the function returns the squared value.

Instead of performing the calculation inside the main() function, a separate function is created to handle the operation. This makes the program more organized, reusable, and easier to understand.

What the Program Does

• Prompts the user to enter a number.
• Passes the entered value to the square() function.
• The function multiplies the number by itself and returns the result.
• The main program prints the final squared value.
• Uses getch() to pause the screen (Turbo C feature).

Example Input

Enter a number: 5

Example Output

The square is: 25.00

Summary: The program takes a number from the user, sends it to a function that calculates its square, and prints the result on the screen.