Need help on this while statement, thanks!

I'm wondering if something is wrong with this code.

the supposed output should be:

Code:

---

Enter gallons consumed(-1 to end): -1
//skips the miles prompt and ends the loop
...some code after loop...

---

but it still asks for the miles value to be entered and then ends the loop. what's wrong with this? please help.

here's the code:

Code:

---

while (gallon != -1)
    {
          printf("Enter gallons consumed(-1 to end): ");
          scanf("%f", &gallon);
         
          printf("Enter miles: ");
          scanf("%f", &miles);
         
          tmil += miles;
          tgal += gallon;
         
          mpg = miles/gallon;
         
          printf("Your fuel efficiency is %.2f\n\n", mpg);
          }

---

Thanks,

Jann

Notice that after you read -1 to gallon, you don't check for it. Basically, you need to fix the logic.

awts! that's it! thanks a lot laserlight!