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  1. //Xinnuo Wang            CS1A                   chapter 4, p.223  #16
  2. //
  3. /*******************************************************************************
  4.  * 
  5.  * Caculate Fat Grams
  6.  * _____________________________________________________________________________
  7.  * This program accepts the number of calories and fat grams and caculates the 
  8.  * percentage of calories that come from fat
  9.  * 
  10.  * Computation is based on the formula:
  11.  * Calories from fat = fat grams * 9
  12.  * The percentage of calories = Calories from fat ÷ total calories
  13.  * _____________________________________________________________________________
  14.  * INPUT
  15.  *  Total calories                      : The accepted number of total calories 
  16.  *  Total grams                         : The accepted number of grams from food
  17.  * PROCESS
  18.  *  Calories from fat                   : The number of calories from fat
  19.  * OUTPUT
  20.  *  The percentage of calories from fat : The percentage of calories from fat
  21.  * 
  22.  ******************************************************************************/
  23. #include <iostream>
  24. using namespace std;
  25.  
  26. int main() 
  27. {
  28. 	double totalGrams;                  //INPUT - The accepted number of total calories 
  29. 	double totalCalories;               //INPUT - The accepted number of total grams
  30. 	double caloriesFromFat;             //PROCESS - The number of calories from fat
  31. 	double percentageOfCaloriesFromFat; //OUTPUT - The percentage of calories from fat
  32. //
  33. //Data Input
  34. 	cout << "Enter the number of grams" << endl;
  35. 	cin>> totalGrams;
  36. 	cout << "Enter the number of calories" << endl;
  37. 	cin>> totalCalories;
  38. //
  39. //Caculate Calories from Fat 
  40. 	caloriesFromFat = totalGrams * 9;
  41. //
  42. //Caculate The Percentage of Calories from Fat
  43. 	percentageOfCaloriesFromFat = caloriesFromFat / totalCalories * 100;
  44. //Output
  45. 	if(percentageOfCaloriesFromFat< 30)
  46. 	cout << "The food is low in fat" << endl;
  47. 	else if(totalGrams<0 && totalCalories< 0)
  48. 	cout<< "Invalid input" <<endl;
  49. 	else if(caloriesFromFat>totalCalories)
  50. 	cout << "either the calories or fat grams were incorrectly entered" <<endl;
  51. 	return 0;
  52. }
Success #stdin #stdout 0s 5324KB
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Enter the number of grams
Enter the number of calories
The food is low in fat
https://ideone.com/axkEO3
language:
C++ (gcc 8.3)
created:
9 hours ago
visibility:
public

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