Thread: End of user input must be 999

Originally Posted by Spidey

Well, I'm assuming you've got the first part done since your posting it.
So, That means that you are reading in input and storing it somewhere right ?
So, all you have to do is think of a way to not read in more data if the user entered 999.
Try writing it in english and then work your way into code.

heres a simple example -

Ask the user for input.
Check the input.
If it is not 999, store it.
otherwise
stop asking for input.

should i use "if... else....." to solve it?

should i use "if... else....." to solve it?

Well, there are a number of ways you could solve this problem.
My point was not to take it what I wrote as a direct translation, but to think about the problem and how you would solve it.

If you believe you could do it using an if..else statements then go ahead and try it out and see what you come up with. After that think of ways to improve your program or how you could write it using a different approach.

The best way to learn programing is by actually doing it, and I'm sure you've heard this/will hear this a lot of times.
So write some code and see where you get with it.

Code:

#include <stdio.h>
int main ()
{
 float average, fahrenheit, Celcius, total;
 int counter;

 total = 0;
 counter = 0;

 printf("Enter temperature readings in Fahrenheit (999 to end): ");
 scanf("%f", &fahrenheit);
 while (fahrenheit != 999)
 {
  Celcius = (fahrenheit-32) * 5/9;
  total = total + Celcius;

  counter = counter + 1;
  printf("\n%d.Fahrenheit\tCelsius\n", counter);
  printf("%.2f\t\t%.2f\n\n", fahrenheit, Celcius);

  scanf("%f", &fahrenheit);
 }

 if (counter != 0) {
 average = total / counter;
 printf("Average is %.2f Celcius\n", average);
 }
 else
 printf("No reading is entered.\n");

 return 0;
}

but, my 'else" isnt workin...
how can i fix it?

In what way does it not work?

Originally Posted by tabstop

In what way does it not work?

ok~
the program should exit to else statement if i enter the input without 999..
but it doesnt go to else statement....

Code:

Enter temperature readings in Fahrenheit (999 to end): 77

1.Fahrenheit    Celsius
77.00           25.00

You have no if, let alone an else, inside your while loop.

Originally Posted by tabstop

You have no if, let alone an else, inside your while loop.

ah ha!! got it tabstop!! gee~ thanks!