whileloop/running total problem

hi i have been asked to input 2 integers, a drivers MILES and LITRES of fuel they have used.. i am then meant to printf the miles per litre for that specific entry AND a running total of the combined MPL's added so far...

Code:

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#include <stdio.h>

int main( )
{
int miles;
int litres;
int tanks;
int mpl;
int totalmpl;
int counter;

while ( miles > 0, counter++ ) {
        printf("please enter the amount of miles you have driven, alternatavely, press 0 to finish the script.\n");
        scanf("%d", &miles);

        printf("please enter the amount of litres you used\n");
        scanf("%d", &litres);

        mpl=miles/litres;

        printf("the number of miles per litre you have gained is:%d\n", mpl);

        while (counter > 1)
                {
                totalmpl=mpl+mpl;
                printf("the total running miles per litre is:%d\n", totalmpl);
                }
}
  return 0;

}

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this outputs nothing, if anyone can help i would be delighted. THANKS :)

FYI: You code has no running total in it.

Code:

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totalmpl=mpl+mpl;

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With the idea that you want a running total.

Try this instead

Code:

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totalmpl=totalmpl+mpl;

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Edit: Your code makes little sense to me.

Code:

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while (counter > 1)

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Is there any reason to believe the value of counter is changing inside the loop?
I say no, therefor the loop will never run or be endless!

Tim S.

Quote:

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while ( miles > 0, counter++ )

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Since miles is uninitialized at this point, it is just as likely to be negative as positive. You need to initialize it to 1 or something first. The same is even more true for counter, altho I actually don't see counter as serving any useful purpose here. Just add mpl to total (total should be initialized to 0 -- that's three uninitialized variables that need to be, tch) and get rid of counter.