Thread: Help - AVG function in Loop

I can't get the average function to work after the loop. I don't know if my accumulate counter isn't working or I have something wrong with my average...But its not outputting the right file. Any suggestions?

Is there a reason you decided to paste on image instead of code? From a glance nothing looks suspicious except for fflush(stdin); - how exactly is the file wrong?

Originally Posted by whiteflags

Is there a reason you decided to paste on image instead of code? From a glance nothing looks suspicious except for fflush(stdin); - how exactly is the file wrong?

Yeah, I'm not sure why I didnt do that. I don't know whats off. Im getting a value of .1 for the avg output after the loop

Code:

 #include

Code:

<stdio.h>

int main (void)
{


/*Variable Delclarations*/
/*----------------------*/

    int   trip;
    float mpg;
    float miles_driven = 0.0;
    float avg = 0.0;
    float gallons;
    float total_gallons = 0.0;
    float miles;

/*Display program info*/
/*--------------------*/

printf ("Welcome to the mileage calculator.\n\n");
printf ("This program will calculate the miles per gallon for you for three tanks of gas after you have entered the gallons used and miles driven.\n\n");

/*User Input*/
/*----------*/

    for (trip = 1; trip <= 3; ++ trip)
    {
printf ("\nEnter the number of gallons used for tank #%d:", trip);
        scanf  ("%f", &gallons);
        fflush (stdin);

        total_gallons = gallons + total_gallons;

printf ("Enter the number of miles driven: ");
        scanf  ("%f", &miles);
        fflush (stdin);

        mpg = miles / gallons;
        miles_driven = miles + miles_driven;
        avg = total_gallons / miles_driven;

printf ("***The miles per gallon used for this tank is %.1f \n",mpg);
        fflush (stdin);

    } // end of loop

/*Display Results*/
/*---------------*/

printf ("\nYour overall average miles per gallon for three tanks is %.1f \n", avg);
    fflush (stdin);

printf ("\nThanks for using the Mileage calculator program!\n");

    return 0;
} /* End Main */

Actually now that I look, you have
avg = total_gallons / miles_driven;
when
avg = miles_driven / total_gallons;
is the right ratio.