While循环表

Question

我需要将摄氏度转换为华氏度的表格。输出应该完全像这样：

onReceive()

诀窍是，整个过程只能使用一个while循环。同样，您不能仅输入所有内容。我正在努力寻找一种方法，使它在每次经过10次转换或类似类型的转换时都开始新的列，我编写了一个程序，但它的la脚和有点作弊：

-40.0C  is  -40.0F  -30.0C  is  -22.0F  -20.0C  is  -4.0F   -10.0C  is  14.0F   
-39.0C  is  -38.2F  -29.0C  is  -20.2F  -19.0C  is  -2.2F   -9.0C  is  15.8F    
-38.0C  is  -36.4F  -28.0C  is  -18.4F  -18.0C  is  -0.4F   -8.0C  is  17.6F    
-37.0C  is  -34.6F  -27.0C  is  -16.6F  -17.0C  is  1.4F    -7.0C  is  19.4F    
-36.0C  is  -32.8F  -26.0C  is  -14.8F  -16.0C  is  3.2F    -6.0C  is  21.2F    
-35.0C  is  -31.0F  -25.0C  is  -13.0F  -15.0C  is  5.0F    -5.0C  is  23.0F    
-34.0C  is  -29.2F  -24.0C  is  -11.2F  -14.0C  is  6.8F    -4.0C  is  24.8F    
-33.0C  is  -27.4F  -23.0C  is  -9.4F   -13.0C  is  8.6F    -3.0C  is  26.6F    
-32.0C  is  -25.6F  -22.0C  is  -7.6F   -12.0C  is  10.4F   -2.0C  is  28.4F    
-31.0C  is  -23.8F  -21.0C  is  -5.8F   -11.0C  is  12.2F   -1.0C  is  30.2F    

所以如果有人有建议请解释。

Answer 1

我强烈建议您创建一种方法，进行从摄氏到华氏的转换，并打印出来。在我的示例中，我将使用conv(double celcius)打印例如“ 40.0C is -40.0F”。

有一种模式：i ₀ 到i ₉ 的十行分别包含-40 + i，-30 + i，{{1}的转换}和-20 + i。

在while循环中，您必须调用-10 + i方法四次。

conv

int i = 0;
while (i < 10) {
    conv(-40 + i);
    conv(-30 + i);
    conv(-20 + i);
    conv(-10 + i);
    System.out.println();
    i++;
}

Answer 2

假设您不希望在while循环外使用计数器变量，并且不想在每次迭代中打印多于一对摄氏-华氏温度：

double celsius = -50.0;
double fahrenheit;

while (celsius < -1){

    if(celsius >= -10){
        celsius -= 39;
        System.out.println();
    }
    celsius1 += 10;
    fahreheit = (celsius * (1.8) + 32.0);
    System.out.printf ("%.1fC  is  %.1fF\t",celsius, fahrenheit);
}

Answer 3

好吧，它们彼此相差十度，因此您可以消除几个变量以简化代码：

public class TempConvWorking {
  public static void main (String[] args) {
    double celsius = -40.0;
    while (celsius < -30.0) {
      System.out.printf(
          "%.1fC  is  %.1fF\t%.1fC  is  %.1fF\t%.1fC  is  %.1fF\t%.1fC  is  %.1fF\t\n",
          celsius,
          1.8*celsius + 32.0,
          celsius + 10.0,
          1.8*celsius + 50.0,
          celsius + 20.0,
          1.8*celsius + 68.0,
          celsius + 30.0,
          1.8*celsius + 86.0);
      celsius++;
    }
  }
}

此代码produces the specified output。