Need help with function prototypes

[dru]

Im having problems with prototypes anyone good with them?

[dru]

my code is

#include <stdio.h>

double get_input(); /* prototype to get the input from the user */
double calculate(double); /* prototype to calculate the deggres into celsius */
void output(double, double);    /* prototype to give the output */

double get_input()
{
	double fahrenheit;
	printf("Enter the degrees in Fahrenheit:");
	scanf_s(" %lf", &fahrenheit);  /** Get's the degrees in Fahrenheit temperature from the user using a scanf statement.**/   
	return fahrenheit;
}

double calcuate(double fahrenheit)
{
		double celsius;
		return (celsius = (get_input(fahrenheit) - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/
		
}

void output(double fahrenheit, double celsius)
{	
printf("Degrees in Fahrenheit = %3.1f \n", fahrenheit); /** Print you results to the output */
printf("Degrees in Celsius = %3.1f \n", calculate(celsius));/** Print you results to the output */
}

int main()

{
   double fahrenheit;/* temperature in degrees Fahrenheit */
   double celsius;   /* temperature in degrees Celsius */
   get_input( ); /* invokes get_input */
   calculate(); /* invokes calculate */
   output(fahrenheit, celsius);    /* invokes output */

  return (0);

}

[dru]

please im begging someone to help me

[ltgbau]

double calcuate(double fahrenheit)  {  	double celsius;  	return (celsius = ([B]get_input(fahrenheit)[/B] - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/    }

you use get_input in wrong way, it has no parameter. the right way is below:

double calcuate(double fahrenheit)  {  	double celsius;  	return (celsius = ([B]get_input()[/B] - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/    }

[Banfa]

please im begging someone to help me

It has only been 20 minutes from your first post, you should wait 24 hours before a response like this just to give everyone the chance to wake-up and read your post. We are not all in the same time zone as you.

Your prototypes look fine, but you are not envoking the functions correctly

   get_input( ); /* invokes get_input */
   calculate(); /* invokes calculate */

should be

   fahrenheit = get_input( ); /* invokes get_input */
   celsius = calculate(fahrenheit); /* invokes calculate */

[dru]

Error when ran:lgtbau's
f:\documents\vi sual studio\celsius 2\celsius 2\celsius 2.c(45) : error C2198: 'calculate' : too few arguments for call

[dru]

i apologize for that its that i have been trying to figure this out for days and its due in less than 5 hours

but i reall apprecuiate the help

[dru]

by the way this program is in C

[dru]

Error when ran Banfa's

f:\documents\vi sual studio\celsius 2\celsius 2\celsius 2.c(45) : warning C4700: uninitialized local variable 'fahrenheit' used
1>f:\documents\ visual studio\celsius 2\celsius 2\celsius 2.c(46) : warning C4700: uninitialized local variable 'celsius' used
1>Linking...
1>Celsius 2.obj : error LNK2019: unresolved external symbol _calculate referenced in function _main
1>F:\Documents\ Visual Studio\Celsisu2 a\Debug\Celsisu 2a.exe : fatal error LNK1120: 1 unresolved externals

[dru]

any1 got any ideas?

[dru]

New Updated Code:

#include <stdio.h>

double get_input(); /* prototype to get the input from the user */
double calculate(double); /* prototype to calculate the deggres into celsius */
void output(double);    /* prototype to give the output */

double get_input()
{
	double fahrenheit;
	printf("Enter the degrees in Fahrenheit:");
	scanf_s(" %lf", &fahrenheit);  /** Get's the degrees in Fahrenheit temperature from the user using a scanf statement.**/   
	return fahrenheit;
}

double calcuate(double fahrenheit)  
{  	
	double celsius;  	
	return (celsius = (get_input() - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/    
}  

void output(double celsius)
{	
printf("Degrees in Celsius = %3.1f \n", celsius);/** Print you results to the output */
}

int main()

{
   double fahrenheit;/* temperature in degrees Fahrenheit */
   double celsius;   /* temperature in degrees Celsius */
   get_input(); /* invokes get_input */
   calculate(); /* invokes calculate */
   output(celsius);    /* invokes output */

  return(0);

}

Errors coming up after compiled:

>------ Build started: Project: Celsisu2a, Configuration: Debug Win32 ------
>Compiling...
>Celsius 2.c
>f:\documents\v isual studio\celsius 2\celsius 2\celsius 2.c(43) : error C2198: 'calculate' : too few arguments for call
>Build log was saved at "file://f:\Documents\Vi sual Studio\Celsisu2 a\Celsisu2a\Deb ug\BuildLog.htm "
>Celsisu2a - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[ltgbau]

double calcuate(double fahrenheit)
this function doesn't need the fahrenheit parameter
so it should be
double calcuate()
try it.
onother error: the exact function name is calculate

[dru]

Well I didn't try taht yet but I did try this and it works one problem though on my compiler for some reason it asks for degrees in farenheit 3 times before working any ideas here the code:

/********************************************************************************
 Name:Andrew Lichenstein        Program:Celsius2.c

 SS#:0287                       Total Points:50

 Due:09/13/2006

 Description: This programs allows you to enter a temperature in Fahrenheit
              and this program will convert it into Celsius by using prototypes.
*********************************************************************************/

#include <stdio.h>

double get_input(); /* prototype to get the input from the user */
double calculate(double); /* prototype to calculate the deggres into celsius */
void output(double);    /* prototype to give the output */

double get_input()
{
   double fahrenheit;
   printf("Enter the degrees in Fahrenheit:");
   scanf_s("%lf", &fahrenheit);  /** Get's the degrees in Fahrenheit temperature from the user using a scanf statement.**/      return fahrenheit;
}

double calculate(double fahrenheit)  
{        
	double celsius;         
	return (celsius = (get_input() - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/    
} 

void output(double celsius)
{    printf("Degrees in Celsius = %3.1f \n", calculate(celsius));/** Print you results to the output */
}

int main()

{
  double fahrenheit = 0;/* temperature in degrees Fahrenheit */
  double celsius = 0;   /* temperature in degrees Celsius */
  get_input(); /* invokes get_input */
  calculate(fahrenheit); /* invokes calculate */
  output(celsius);    /* invokes output */

 return 0 ;

}

I will try what you said while i wait

[ltgbau]

1st call in get_input
2nd call in calculate
3rd call in output
the problem is in the logic that you want the program to run, not in code

double calculate(double fahrenheit)    {          	double celsius;           	return (celsius = (get_input() - 32) * (5.0 / 9.0)); /*Calculates the degrees Celsius from the degrees Fahrenheit*/      }

replace get_input() by fahrenheit

[dru]

why does it make it ask input 3 times?