C++ Write a program that first asks the user which Temperature scale conversion he/she would like to perform: 1. Convert F to C
2. Convert C to F
3. Quit

What is your choice?

Then it asks the user for input for three real number variables: start_temp, end_temp, temp_incr. It will then produce a two column Fahrenheit to Celsius table or a two column Celsius to Fahrenheit table, depending on the choice.
For choice 1, the first column should be labeled Fahrenheit and the first value the Fahrenheit column is start_temp. The second column should be labeled Celsius, and its value is calculated from the values in the Fahrenheit column using the formula
C = (5.0/9.0)*(F – 32.0).
For choice 2, the table will show the Celsius column first, Fahrenheit column second, and use the formula
F = 9.0/5.0 * C + 32.0

The values for the temps in the first column will be incremented by temp_incr, and end when the table value would exceed the end_temp value. Display all values with 2 decimal of accuracy, justified and aligned.
Requirements:

1) A detailed algorithm
2) Verify all numeric data are acceptable and not character
3) Follow all good programming practices such as descriptive variable names, constants names, proper indentation,...
4) Verify input for correct range and type ( not character)
5) Output should be the same as the sample shown below, I used 30 ‘–‘ for the underlining of heading.
Sample Output

Output Sample:

Choose a conversion type:
1. Convert F to C
2. Convert C to F
3. Quit

What is your choice? 1

Enter starting value: 29
Enter ending value: 32
Enter increment value: 0.5

Fahrenheit Celsius
29.00 -1.67
29.50 -1.39
30.00 -1.11
30.50 -0.83
31.00 -0.56
31.50 -0.28
32.00 0.00
Choose a conversion type:
1. Convert F to C
2. Convert C to F
3. Quit

What is your choice? 4

Invalid choice. Try again.
Choose a conversion type:
1. Convert F to C
2. Convert C to F
3. Quit

What is your choice? 2

Enter starting value: 35
Enter ending value: 32
Enter increment value: -1

Celsius Fahrenheit
35.00 95.00
34.00 93.20
33.00 91.40
32.00 89.60
Choose a conversion type:
1. Convert F to C
2. Convert C to F
3. Quit

What is your choice? 2

Enter starting value (integer number): 35
Enter ending value (integer number): 32
Enter increment value (real number): 1

Invalid range. Try again.
Choose a conversion type:
1. Convert F to C
2. Convert C to F
3. Quit

What is your choice? 3

Thank you for your using my program. Program terminated.

THIS IS MY CODE:
#include
#include
using namespace std;

const int CWIDTH = 26;

int main() {

int choice;
double convertFoC, converCtoF;
double starting, endvalue, incrementvalue;
const int CWIDTH = 13;

cin >> choice;

switch (choice)
{
case 4:
cout > starting;
if (starting == 28){
cout > endvalue;

cin >> incrementvalue;

switch (choice) {

case 1:
cout << "Fahrenheit" << setw(17) << "Celsius" << endl;
for (double calcCelsius = starting; calcCelsius <= endvalue; calcCelsius = calcCelsius + incrementvalue)
{
convertFoC = (5.0 / 9.0) * (calcCelsius - 32.0);
cout << showpoint << fixed << setprecision(2) << calcCelsius << setprecision(2) << setw(21) << convertFoC << right;
cout << endl;
}
break;

case 2:
cout << "Celsius" << setw(CWIDTH) << "Fahrenheit\n";
for (double calcFahrenheit = starting; calcFahrenheit <= endvalue; calcFahrenheit = calcFahrenheit + incrementvalue)
{
converCtoF = ((9.0 / 5.0) * calcFahrenheit) + 32.0;
cout << setw(CWIDTH) << showpoint << fixed << setprecision(1) << calcFahrenheit << fixed << setprecision(1) << setw(CWIDTH) << converCtoF << right;
cout << endl;
}

}

}

This is my code but i have a lot of test that i can't get into it.
like the screenshoots that i post here.