Thread: Getting Error: Called Object is not a Function

Hello All,

This is just a simple programming challenging from a book I'm using to learn C, it doesn't call for the if/else statement but I wanted to add it. I have used if/else before successfully, but for some reason now on the else portion it wont do the calculation. At first I thought celsius was a reserved word and thats why it was failing, but so I changed the variables name but still same error.

Code:

#include <stdio.h>

int
main(void)
{
    int Choice; /* stores users choice on conversion */
    double fahrenheit; /* stores the temp in Fahrenheit */
    double centigrade; /* stores the temp in Celsius */
 
    /* Asks the user what they want to convert. */
    printf("Please choose how you want to convert\n");
    printf("Press 1 for Celsius to Fahrenheit\n");
    printf("Press 2 for Fahrenheit to Celsius: ");
    scanf("%d", &Choice);

    /*Determines what the user chooses */
    if (Choice == 1)
    {
        /* Obtains the temp and converts to fahrenheit */
        printf("\nPlease enter in the Temp in degree's Celsius: ");
        scanf("%lf", &centigrade);

        fahrenheit = (9/5 * centigrade)+32;

        printf("\n %.2f Celsius is %.2f Fahrenheit\n ", centigrade, fahrenheit);
    }
    else
    {
        /* Obtains the temp and converts to Celsius */
        printf("\nPlease enter in the Temp in degree's Fahrenheit: ");
        scanf("%lf", &fahrenheit);

        centigrade = (5/9)(fahrenheit - 32);

        printf("\n %.2f Fahrenheit is %.2f Celsius\n", fahrenheit, centigrade);

        
    }
      

        return(0);

}

when compiled I get this error ConvertTemp.c:40: error: called object is not a function and line 40 is centigrade = (5/9)(fahrenheit -32); but the equation in the if statement runs fine, and if I take else out completely it runs fine. I read around about people with similar errors, and tried to use the fixes they had but most were when they were actually calling a function aside from stdio.h I'm not calling any others. Thanks in advance.

Thanks so much, I was thinking that ()() would be multiplication like in algebra. I will make a note of that in the future, always have to use the operators.