1. ## Output of If-else ladder not functioning

For some reason the output will not print the any charge. I don't understand why. I know its a stupid little error, but I am a stupid little programmer. :^)

Code:
```#include <iostream.h>
#include <iomanip.h>
#include <windows.h>
#include <math.h>

void input(int &group, double &time);
void computation(int &group, double &time, double &charge);
void output(int &group, double &time, double &charge);

int main()
{
int group; // type of vehical array
double time; // time in lot variable
double charge; // charge variable

input(group, time);

computation(group, time, charge);

output(group, time, charge);

return 0;
}

// definition of input function

void input(int &group, double &time)
{
cout << "Please enter the type of vehical to be charged." << endl;
do
{
cout << "(Enter 1 for Car, 2 for Truck, or 3 for Senior Citizen)" << endl;
cin >> group;

if(group != 1 && group != 2 && group != 3)
{
cout << "Please enter a correct charge group";
}
}
while(group != 1 && group != 2 && group != 3);

do
{
cout << "Please enter the length of time stayed." << endl;
cin >> time;

if(time <= 0)
{
cout << "Please enter a positive time";
}
} while(time <= 0);

}

// definition of computation function

void computation(int &group, double &time, double &charge)
{
if(group == 1)
{
if(time > 5)
{
charge = (time - 5) * .25 + 2;
}
else if(time > 1)
{
charge = (time - 1) * .5;
}
}

if(group == 2)
{
if(time > 6)
{
charge = (time - 6) * .75 + 4;
}
else if(time > 2)
{
charge = time - 2;
}
}
else
{
charge = 0;
}
}

// definition of output function

void output(int &group, double &time, double &charge)
{
cout << endl << "Parking Lot Bill" << endl;
if(group == 1)
{
cout << "Charge Group: "<< "Car" << endl;
}
else if(group == 2)
{
cout << "Charge Group: " << "Truck"  << endl;
}
else if(group == 3)
{
cout << "Charge Group: " << "Senior Citizen"  << endl;
}
cout << "Time In Lot : " << time << " Hours" << endl;

if(charge = 0)
{
cout << "Total Charge: " << "No Charge" << endl;
}

if(charge != 0)
{
cout << "Total Charge: \$" << charge << endl;
}
cout << endl << "Thank You, Have A Nice Day" << endl;
}```

2. Code:
`if(charge == 0)`

3. if(charge != 0)

Is also redundent. You check, (or will be checking), to see if it is equal to zero, so all you need is an else there.