How do I fix program program to write \"No trips taken if -1 is entered using Sy

Question

How do I fix program program to write "No trips taken if -1 is entered using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { int miles; int gallons; miles = 0; gallons = 0; int mpg; mpg = 0; int totalMiles; int totalGallons; totalMiles = 0; totalGallons = 0; int tripCounter; tripCounter = 0; int ompg; ompg = 0; while (miles != -1) { Console.Write("Enter miles in this tank: "); miles=Convert.ToInt32(Console.ReadLine()); if (miles != -1) { Console.Write("Enter gallons in this tank: "); gallons = Convert.ToInt32(Console.ReadLine()); ompg = miles / gallons; totalMiles = totalMiles + miles; totalGallons = totalGallons + gallons; tripCounter = tripCounter + 1; Console.WriteLine("Miles per Gallons: {0}", ompg); if (tripCounter > 0) { mpg = totalMiles / totalGallons; Console.WriteLine("overall miles per gallons: {0}", mpg); } else { Console.WriteLine("No trips taken: "); } } }//end while miles!=-1 Console.ReadLine(); } } }

Explanation / Answer

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { int miles; int gallons; miles = 0; gallons = 0; int mpg; mpg = 0; int totalMiles; int totalGallons; totalMiles = 0; totalGallons = 0; int tripCounter; tripCounter = 0; int ompg; ompg = 0; while (miles != -1) { Console.Write("Enter miles in this tank: "); miles=Convert.ToInt32(Console.ReadLine()); if (miles != -1) { Console.Write("Enter gallons in this tank: "); gallons = Convert.ToInt32(Console.ReadLine()); ompg = miles / gallons; totalMiles = totalMiles + miles; totalGallons = totalGallons + gallons; tripCounter = tripCounter + 1; Console.WriteLine("Miles per Gallons: {0}", ompg); if (tripCounter > 0) { mpg = totalMiles / totalGallons; Console.WriteLine("overall miles per gallons: {0}", mpg); } } }//end while miles!=-1 Console.WriteLine("No trips taken. ");//right after exiting while loop Console.ReadLine(); } } }

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