Fat gram calculator

Design a program that asks the user for the number of fat grams and calories in a food item. Validate the input as follows.
Make sure the number of fat grams and calories are not less than 0.
According to nutritional formulas, the number of calories cannot exceed fat grams * 9. Make sure that the number of calories entered is not greater than fat grams * 9.
Once correct data has been entered, the program should calculate and display the percentage of calories that come from fat. Use the following formula:
Percentage of calories from fat=( Fat grams * 9) / Calories
Some nutritionists classify food as “ low fat” if less than 30percent of its calories come from fat. If the results of this formula are less than 0.3, the program should display a message indicating the food is low in fat.

how to write this in pseudo code for both Module and function?

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method:
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Module main ( )

/ / Local variables
double fatGramCalculator(double fatGrams, double calories)

// If fat grams or calories are less than 0, display a message and return -1
if (fatGrams < 0 || calories < 0)

Display ('Number of fat grams and calories must be greater than 0

return -1;

// If calories is greater than fat grams * 90, display a message and return -1
if (calories > (fatGrams * 9)

Display('Calories must not exceed fat grams x 9

return -1;

// Calculate percentage of calories from fat
double caloriesFromFat = (fatGrams * 9) / calories;

// Display calories from fat, multiplying percentage by 100 to remove decimal point
Display('%d percent of calories from fat,
caloriesFromFat * 100);

// If less than 30% of calories come from fat, display a message
if (caloriesFromFat < 0.3)

Display('Food is low in fat

// Return the number of calories from fat
return caloriesFromFat;

End Module

Function Real sum ( Real fatGrams, Real doubleCalories )
Declare Real result
Set result = ( fatGrams*9 ) / calories
Return result
End Function

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is this right?

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