Thread: temperature

I have a problem

I have to convert temperature between farenhiet and celsius.

here is my code

Code:

#include <stdio.h>

int main ()
{
   double temp;
   int check;

   printf("Please enter a fahrenheit temperature ");
   check = scanf("%f", &temp);
   if (check != 1)
   {
      printf("Invalid input\n");
      return 0;
   }

   temp = (temp - 32.0) * 5.0 / 9.0;
   printf("\nTemperature converted to celsius = %.1f\n", temp);

   return 0;
}

my problem is that i get the wrong results. When i enter 5 i should be getting -15.0 but instead i get 1120.0. Can someone help me.

i found why the result stuffed up, i had to change the double to a float. Can any one tell me the difference between double and float? I always thought they were the same thing

Code:

#include <stdio.h>

main()
{
	float celcius, farenheit;

	printf("Enter temp in Farenheit: ");
	scanf("%f", &farenheit);

	celcius = (farenheit - 32) * 5/9;
	
	printf("Celcius: %f\n", celcius);
}

> Can any one tell me the difference between double and float?
Well it's important in the scanf

scanf( "%f", &float_var );
scanf( "%lf", &double_var );

doubles typically take up twice as much memory as floats, but they are a lot more precise, and have a greater range than floats.