Thread: Need help with a temperature c prog, thanks

Hi,

Im trying to make a program that gathers a kelvin temp, changes it to either celcius/fahrenheight then determines the state of a sample of water (gas, solid, liquid)
When I wrote this program out the first time i couldnt get it to work, so i kept on altering it and altering it and now i just cant even think :/ can anyone look over my code and help me straighten out a few things? it says there is 1 error and some warnings but I know there is lots wrong

thanks.

Code:

 
/*Prac7prog1*/

#include <stdio.h>
#include <conio.h>
#include <math.h>
#include <ctype.h>

double readnumber()
{
	char ch[10];
	double input;
	printf("\n");
	printf("°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°");
	printf("°°°°°°°	   Enter a temperature in Kelvin:    °°°°°°°");
	printf("°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°");
	fflush(stdout);
	fgets(ch,sizeof ch,stdin);
	input=atof(ch);
	return(input);
}

int temptype()
{
	char ch[10];
	char option;
	do {
	printf(" ****** Select Which option do you wish view ****** ");
	printf("°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°");
	printf("°°  Enter 'F' for Fahrenheit or 'C' for Celicus:  °°");
	printf("°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°");
	option=getch();
	option=tolower(option);
	}while(!((option == 'f')||(option == 'c')));
	scanf("%c\n",option);
	return(option);
}

double fahrenheit(double inpF,char option)
{
        if (option == 'f')
        {
	   double inpF
	   inpF=((9*(input-273))/5)+32;
	   if (inpF>=212) type = 1;
	   else if (inpF>=33 && inpF<=211) type = 2;
           else if (inpF<=32) type = 3;
	   return(inpF);
	}
}

double celcius(double inpC,char option)
{
        if (option == 'c')
        {
	   double inpC
	   inpC=input-273;
	   if (inpC>=101) type = 1;
	   else if (inpC>=1 && inpC <= 100) type = 2;
           else if (inpC<=0) type = 3;
	   return(inpC);
	}
}

int Main(void)
{
	double input=0.0, type;
	char option, opt;

        printf("This program checks to see whether a temperature is in Gas, Liquid or Solid state");
        do
	{
	     printf("\n\nDo you wish to continue? (y/n): ");
	     	do
	        {
	     	opt = getch();
	        opt = tolower (opt);
	        }while (!((opt=='y')||(opt=='n')));
	        printf("%c\n",opt);
                if (opt=='y')
	
                input = readnumber();
	        option = temptype();


         	switch (type)
		{
		  case 1:
			 printf("\nThe state of the water is: Gas, at %.0f degrees Celsius.\n", input);
			 break;
		  case 2:
			 printf("\nThe state of the water is: Liquid, at %.0f degrees Celsius.\n", input);
			 break;
		  case 3:
			 printf("\nThe state of the water is: Solid, at %.0f degrees Celsius.\n", input);
			 break;
	          case 4:
	                 printf("\nThe state of the water is: Gas, at %.2f degrees Fahrenheit.\n", input);
	                 break;
	          case 5:
	                 printf("\nThe state of the water is: Liquid, at %.2f degrees Fahrenheit.\n", input);
	                 break;
	          case 6:
	                 printf("\nThe state of the water is: Solid, at %.2f degrees Fahrenheit.\n", input);
	                 break;
		}
	}
	while (opt!='n');
	return(0);
}