Question

Pseudocode and flowchart for program to determine "low fat foods". Using (fat grams x 9) ÷ calories. with validation functions using while loops.

Answer 1

A program for determining low-fat foods uses the formula (fat grams x 9) ÷ calories to calculate the percentage of calories from fat, considering a food low fat if the result is 30% or less. Pseudocode with input validation through while loops and a flowchart to visualize the process are used as development tools.

Step-by-step explanation:

Pseudocode for Determining Low-Fat Foods

When creating a program to determine if a food item is considered low fat, we can use the formula (fat grams x 9) ÷ calories. If the result of this equation is equal to or less than 30%, then the food can be labeled as 'low fat'. Here is an example of pseudocode incorporating validation using while loops:

function isLowFat(fatGrams, calories):
while fatGrams is invalid:
prompt user to input valid fatGrams
while calories is invalid:
prompt user to input valid calories

fatCaloriesPercentage = (fatGrams * 9) / calories * 100
if fatCaloriesPercentage <= 30:
return True
else:
return False

Flowchart for the Program

The flowchart would start with 'Start', then proceed to input validation for 'fat grams' and 'calories' using while loops. After validation, the necessary calculations are made. A decision node checks if the result is less than or equal to 30%. If so, it outputs 'Low Fat', otherwise 'Not Low Fat', before reaching 'End'.