UMD wants you to write a program that will prompt a user for their account numbe

Question

UMD wants you to write a program that will prompt a user for their account number (int), the billing code (char), and the number of gallons used (float). If the user inputs an invalid code or a negative amount of gallons used, the output should display an error message. After the total cost calculation is made, the program should output the user's account number, billing code, gallons used, and total cost.
I started the program but having problems with it can you help need to have done by Monday2/14.
Here is what I done:
//Header file
#include <iostream>
#include <iomanip>
using namespace std

//function main begins execution of program

int main ()
if ((useCode = 'C' || 'c') && (gallons <= 4000000);

Else if ((useCode == 'C' || useCode == 'c') && (gallons <= (float)4000000))
float computeBill(char, float);

{
int accountNo;
char useCode;
float gallons;
float amountDue;

cout << "Please enter your account number: ";
cin >> accountNo;
cout << "Please enter your use code - enter H for home, C for commercial, or I for industrial: ";

cin >> useCode;
cout << "Please enter the number of gallons you used: ";
cin >> gallons;



cout << "Account Number: " << accountNo << endl;
cout << "Use Code: " << useCode << endl;
cout << "Gallons Used: " << gallons << endl;
cout << "Amount Due: " << amountDue << endl;

{
if ((useCode == 'C' || 'c') && (gallons <= 4000000))

return 1000.00;
}
if (useCode = 'C' || 'c' && gallons > 4000000)
{
return ((gallons - 4000000) * .00025) + 1000;
}
If (useCode == 'I' || 'i' && gallons <= 4000000)
{
return 1000.00;
}
if (useCode == 'I' || 'i' && 4000000 < gallons <= 10000000)
{
return 2000.00;
}
if ((useCode == 'I' || 'i') && (gallons > 10000000))
{
return 3000.00;

Explanation / Answer

please rate - thanks

corrected version

after receiving your message--tried to keep it true to your code

 

//Header file
#include <iostream>
#include <iomanip>
using namespace std;
float computeBill(char, float);
//function main begins execution of program

int main ()
{
int accountNo;
char useCode;
float gallons;
float amountDue;

cout << "Please enter your account number: ";
cin >> accountNo;
cout << "Please enter your use code - enter H for home, C for commercial, or I for industrial: ";
cin >> useCode;
while(useCode!='H'&&useCode!='h'&&useCode!='c'&&useCode!='C'&&useCode!='I'&&useCode!='i')
    {cout<<"must be H, I, or C ";
     cout << "Please enter your use code - enter H for home, C for commercial, or I for industrial: ";
     cin >> useCode;
     }
cout << "Please enter the number of gallons you used: ";
cin >> gallons;
while(gallons<0)
    {cout<<"Must be >=0 ";
     cout << "Please enter the number of gallons you used: ";
     cin >> gallons;
     }
amountDue= computeBill(useCode,gallons);  
cout << "Account Number: " << accountNo << endl;
cout << "Use Code: " << useCode << endl;
cout << "Gallons Used: " <<setprecision(2)<<fixed<< gallons << endl;
cout << "Amount Due: $" <<setprecision(2)<<fixed<<amountDue << endl;
system("pause");
return 0;
}

float computeBill(char useCode,float gallons)
{if(useCode=='h'||useCode=='H')
         return 7.5+gallons*.0025;
else if (useCode == 'C' ||useCode == 'c')
     if(gallons <= 2000000)
             return 1000.00;
     else
             return  1000+(gallons-2000000)*.005;
else
   if ( gallons <= 4000000)
        return 1000.00;
   else if (gallons <= 10000000)
        return 2500.00;
   else
       return 4000.00;
}

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