RatioSomething

RatioArray.java

@@ -0,0 +1,60 @@
+import java.text.DecimalFormat;
+
+/**
+ * RatioArray
+ */
+public class RatioArray {
+
+  // Given an array of integers, calculate the ratios of its elements that are
+  // positive, negative, and zero. Print the decimal value of each fraction on a
+  // new line with
+  //
+  // places after the decimal.
+  //
+  // Note: This challenge introduces precision problems. The test cases are scaled
+  // to six decimal places, though answers with absolute error of up to
+  //
+  // are acceptable.
+  //
+  // Example
+  // There are elements, two positive, two negative and one zero. Their ratios are
+  // , and
+  //
+  // . Results are printed as:
+  //
+  // 0.400000
+  // 0.400000
+  // 0.200000
+  //
+  public static void main(String[] args) {
+    int[] ar = { 1, 1, 0, -1, -1 };
+    Ratio(ar);
+  }
+
+  private static void Ratio(int[] arr) {
+    int n = arr.length;
+    System.out.println("the length of the arr is: " + n);
+    float pos = 0;
+    float neg = 0;
+    float zero = 0;
+    for (int x : arr) {
+      if (x > 0) {
+        pos++;
+      } else if (x < 0) {
+        neg++;
+      } else if (x == 0) {
+        zero++;
+      }
+    }
+    System.out.println("The number of positive ints in the arr is: " + pos);
+    System.out.println("The number of negative ints in the arr is: " + neg);
+    System.out.println("The number of zeros int the arr is: " + zero);
+    double posRatio = pos / n;
+    double negRatio = neg / n;
+    double zeroRatio = zero / n;
+    System.out.println();
+    System.out.printf("The ratio of the positive number is: " + "%.6f\n", posRatio);
+    System.out.printf("The ratio of the positive number is: " + "%.6f\n", negRatio);
+    System.out.printf("The ratio of the positive number is: " + "%.6f\n", zeroRatio);
+  }
+}