Logic error

[Awak3nDreams]

Wondering why my math isn't coming out correctly?

#include <iostream>
#include <iomanip>
using namespace std;

double getStandard(double total);
double getPremium(double total);

int main()
{
    //variable
    double userTotal;

    //ask for user input
    cout << fixed << setprecision(2) << endl;
    cout << "Please enter your total before shipping ($0.00): ";
    cin >> userTotal;
    //get totals for each membership
    cout << "Standard membership price: " << getStandard(userTotal) << endl;
    cout << "Premium membership price: " << getPremium(userTotal) << endl;
}
//return methods to calculate total with standard and premium shipping
double getStandard(double total)
{
    double standardTotal;
    
    if (total >= 0 || total <= 100)
    {
        standardTotal = total + 12.99;
    }
    else
    {
        standardTotal = total + 4.99;
    }
    return standardTotal;    
}
double getPremium(double total)
{
    double premiumTotal;

    if (total >= 0 || total <= 49.99)
    {
        premiumTotal = total + 4.99;
    }
    else
    {
        premiumTotal = total;
    }
    return premiumTotal;
}

[dutch]

You presumably want to use && instead of ||. With || the 'if' part will always be done if total is >= 0 since if EITHER of the conditions is true the 'if' block is run. You only want it to run if BOTH the conditions are true.
And the second part of the getPremium condition should be total < 50.

[Awak3nDreams]

Thank you.