I'm I programming right?

[nurofen]

Hi,

I'm learning C from Mark Virtue's cds chapter3 . I have completed the tasks both work as they should but they are very different from Marks soluations. I would to know if there is a problem with the way i'm learning to program?

My 1st soluation

/*
 * input frist name
 * input second name 
 * output fullname with a space 
 * output the length of the name including the space 
 */ 

#include <stdio.h>
main()
{
         char	name[15];
         char	s_name[15];
         int    length;
         
         printf("Enter your first name: ");
   	     scanf("%s", name);
   	     printf("Enter your second name: ");
   	     scanf("%s", s_name);
   	     printf("Your name is %s %s\n", name, s_name); 
         
             length = strlen("%[^\n] %s %s"); 
             printf("The length of this string >>%s %s<< is %d characters\n", 
                                                         name, s_name, length);	     
             fflush(stdin);
      	     getchar();
}

Marks Soluation

/*
 *  fullname.c
 *
 *  Solution to the name exercise from Chapter 3.
 *  Ask for a user's first name and surname as two separate questions
 *  and output the result as a concatenated string (plus the length of the
 *  name).
 *
 *  by Mark Virtue, 2001.
 */
#include <stdio.h>

main()
{
    char    first[31];
    char    sur[31];
    char    result[62];

    /*
     *  First, get the names from the keyboard
     */
    printf("Please enter your FIRST name: ");
    scanf("%[^\n]", first);
    printf("Please enter your LAST name:  ");
    fflush(stdin);
    scanf("%[^\n]", sur);

    /*
     *  Concatenate them together into "result" with a space between
     */
    strcpy(result, first);
    strcat(result, " ");
    strcat(result, sur);

    /*
     *  Output the result
     */
    printf("Your FULL name is %s (length %d)\n", result, strlen(result));

    fflush(stdin);
    getchar();
}

My 2nd Soluation

/*
 * Celsius to Fahreneit
 * 
 */ 

#include <stdio.h>

main()
{
      float cel;
      double fah;
            
      printf("Enter a Celsius to convert to Fahreneit: ");
      scanf("%f", &cel);
      fah = cel * 9 /5 + 32;
      
      printf("Fahreneit = %.2f\n", fah);
     
      fflush(stdin);
      getchar();
}

Marks Soluation

/*
 *  temperature.c
 *
 *  Solution to the Celsius to Fahrenheit exercise from Chapter 3.
 *  Ask for a temperature in degrees Celsius and output the corresponding
 *  Fahrenheit value to two decimal places.
 *
 *  by Mark Virtue, 2001.
 */
#include <stdio.h>

main()
{
    int     celsius;
    double  fahr;

    /*
     *  First, get the Celsius value from the keyboard
     */
    printf("Please enter a temperature in degrees Celsius: ");
    scanf("%d", &celsius);

    /*
     *  Perform the conversion  F = 32 + C * 9/5
     */
    fahr = 32 + (double)celsius * 9 / 5;

    /*
     *  Output the result
     */
    printf("%d degrees Celsius = %.2f degrees Fahrenheit\n",
                        celsius, fahr);

    fflush(stdin);
    getchar();
}

Thanking you in advance for any of your time helping me.


Nurofen