C_User_Input.c

Here’s the updated C code with added documentation and an explanation:

#include <stdio.h>

/**
 * @brief The main function demonstrates basic input and output in C.
 * 
 * This function prompts the user to enter an integer, reads the integer value from input,
 * and then prints the value entered by the user.
 * 
 * @return int Returns 0 to indicate successful execution.
 */
int main() {
    int number;  /**< Integer variable to store the user's input. */

    // Prompt the user to enter a number
    printf("Enter a number: ");

    // Read the integer value from user input
    scanf("%d", &number);

    // Print the value entered by the user
    printf("You entered: %d\n", number);

    return 0;   /**< Return 0 to indicate successful execution. */
}

Explanation

1. Variable Declaration:

   • int number; declares an integer variable number to store the value entered by the user.

2. Prompting User Input:

   • printf("Enter a number: "); prompts the user to enter an integer.

3. Reading User Input:

   • scanf("%d", &number); reads the integer input from the user and stores it in the number variable. The %d format specifier is used to read integer values.

4. Printing the User Input:

   • printf("You entered: %d\n", number); prints the value of number that was entered by the user.

5. Return Statement:

   • return 0; indicates that the program has executed successfully. The value 0 is returned to the operating system.