Conversion program

[Demonten]

I'm a beginner with C++ and decided to make a quick conversion program. It does everything I want it to, except for one thing. When I have it convert from meters, I want it to then present the option of converting to either AU or feet. Instead it just does both. I wouldn't have a problem with that, except for the way it does it. As far as I know I can't attach files to posts on this forum, so I can't supply you with the .exe, but I'll post the code. I use Code::Blocks. I also have a bunch of other compilers etc.

#include<cstdio>
#include<cstdlib>
#include<iostream>
using namespace std;
int main(int nNumberofArgs, char* pszArgs[])
{
    //variables
    string var, var1;
    float cm, mile, kilometer, inch, meter, AU, fahrenheit, celsius, foot, quit, i;
    //program
    i = 1;
    while (i <= 1000000000) {
        cout << "Enter the starting unit. For a list of all units and commands, type list. To exit, type quit. Please note that this program will only loop one billion times." << endl <<endl;
        cin >> var;
        cout << endl;

            if (var == "quit")
                {
                    return 0;
                }
            //list of functions
            if  (var == "list")
               {
                cout << "For cm to inch type centimeter. For inch to cm type inch. For miles to km type mile. For km to miles type kilometer. For meters to AU or feet type meter. For AU to meters type AU. For feet to meters type feet. For fahrenheit to celsius type fahrenheit. For Celsius to Fahrenheit type celsius then rerun the program." << endl << endl << endl;
               }
            //inches to centimeters
            if  (var == "inch")
               {
                cout << "Please enter the number of inches" << endl;
               cin >> inch;
                cm = inch * 2.54;
                cout << "Distance in centimeters:" << endl;
                cout << cm << endl;
               }
            //centimeters to inches
            if  (var == "centimeter")
              {
                cout << "Please enter the number of centimeters" << endl;
                cin >> cm;
                inch = cm / 2.54;
                cout << "Distance in inches:" << endl;
                cout << inch << endl;
              }
            //miles to kilometers
            if  (var == "mile")
                {
                cout << "Please enter the number of miles" << endl;
               cin >> mile;
                kilometer = mile * 1.609344;
                cout << "Distance in kilometers:" << endl;
                cout << kilometer << endl;
                }
            //kilometers to miles
            if  (var == "kilometer")
             {
                cout << "Please enter the number of kilometers" << endl;
                cin >> kilometer;
                mile = kilometer / 1.609344;
                cout << "Distance in miles:" << endl;
                cout << mile << endl;
             }
            //meters to AU or feet
            if  (var == "meter")
                {
                cout << "Please select which unit you would like to convert meters to out of Astronomical units and feet" << endl;
                cin >> var1;
                //AU
                if  (var1 == "AU");
                {
                    cout << "Please enter number of meters" << endl;
                   cin >> meter;
                    AU = meter / 149598000000;
                    cout << "Distance in AU:" << endl;
                    cout << AU << endl;
                }
                //feet
                if  (var1 == "feet")
                   {
                    cout << "Please enter number of meters" << endl;
                    cin >> meter;
                    foot = meter * 3.2808399;
                    cout << "Distance in feet:" << endl;
                    cout << foot << endl;
                   }
                }
            //AU to meters
            if  (var == "AU")
                {
                cout << "Please enter number of AU" << endl;
                cin >> AU;
                meter = AU * 149598000000;
                cout << "Distance in meters:" << endl;
                cout << meter << endl;
                }
            //feet to meters
            if  (var == "feet")
               {
                cout << "Please enter number of feet" << endl;
                cin >> foot;
                meter = foot / 3.2808399;
                cout << "Distance in meters:" << endl;
                cout << meter << endl;
               }
            //fahrenheit to celsius
            if  (var == "fahrenheit")
                {
                cout << "Please enter temperature in Fahrenheit." << endl;
                cin >> fahrenheit;
                celsius = (fahrenheit - 32) * (5 / 9);
                cout << "Temperature in celsius:" << endl;
                cout << celsius << endl;
                }
            //celsius to fahrenheit
            if  (var == "celsius")
                {
                cout << "Please enter temperature in Celsius." << endl;
                cin >> celsius;
                fahrenheit = (celsius * (9 / 5)) + 32;
                cout << "Temperature in Fahrenheit:" << endl;
                cout << fahrenheit << endl;
                }
        i++;
    }
    system("PAUSE");
}

I know it's really crude, but I commented it so it shouldn't be too bad. If you have any suggestions, let me know. Also, is there a way to change font colour in cmd? I know it's possible, but I was wondering if I could make it so the results it displays are in one colour and the text in another. I also apologize for the width of this post.

[nano511]

Cut out all the unnecessary code. No one wants to search through your code to find out what your talking about

[shacktar]

Your problem is this line:

if (var1 == "AU");

The semi-colon at the end essentially makes the statement be "if var1 is "AU" then do nothing". That makes it so the conversion from meters to AU always occurs.