temperature

This is a discussion on temperature within the C Programming forums, part of the General Programming Boards category; I have a problem I have to convert temperature between farenhiet and celsius. here is my code Code: #include <stdio.h> ...

  1. #1
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    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.

  2. #2
    Unregistered
    Guest
    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

  3. #3
    Registered User moonwalker's Avatar
    Join Date
    Jul 2002
    Posts
    282

    here..

    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);
    }

  4. #4
    and the hat of wrongness Salem's Avatar
    Join Date
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    32,506
    > 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.

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