java - 需要帮助计算值(value)百分比

Question

我在编写作业时遇到了一些问题。

我很好奇如何计算用户输入的每个值的百分比。我在尝试找到正确的措辞方式以使其可读并且可以被 Java 正确解释时遇到了一些麻烦。

我的目标是计算脂肪、碳水化合物和蛋白质的克数各自的百分比，并将其显示在屏幕上。我不是要别人帮我做作业，我只是需要一点指导。

  //local constants

  //local variables
  int carb;           // amount of carbs entered by user
  int fat;            // amount of fat entered by user
  int pro;            // amount of protein entered by user
  int sum;            // sum of three numbers

  //myLib = new Library();

  /********************   Start main method  *****************/

  //Prompt user for amount of carbohydrates
  System.out.print("Please enter the amount of carbohydrates: ");
  carb = Keyboard.readInt();

  //Prompt user for amount of fat
  System.out.print("Please enter the amount of fat: ");
  fat = Keyboard.readInt();

  //Prompt user for amount of protein
  System.out.print("Please enter amount of protein: ");
  pro = Keyboard.readInt();

  //Calculate the sum of the three numbers
  sum = carb + fat + pro;

Answer 1

正如 Raman 所说，现在计算百分比相对容易，因为您已将总和整齐地存储在一个变量中

double carbPercent = ((double)carb / sum) * 100
double fatPercent = ((double)fat / sum) * 100
double proteinPercent = ((double)pro / sum) * 100