🎉 feat: initial commit for 1034 using java

developer-zoe · developer-zoe · commit 1938363840fb · 2019-04-20T00:32:59.000+08:00
diff --git a/BasicLevel_Java/1034. 有理数四则运算(20).java b/BasicLevel_Java/1034. 有理数四则运算(20).java
@@ -0,0 +1,104 @@
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class Main {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+
+        String[] input = br.readLine().split("[\\s/]");
+        long a1 = Integer.parseInt(input[0]);
+        long b1 = Integer.parseInt(input[1]);
+        long a2 = Integer.parseInt(input[2]);
+        long b2 = Integer.parseInt(input[3]);
+
+        if (b1 != 0 && b2 != 0) {
+            add(a1, b1, a2, b2);
+            minus(a1, b1, a2, b2);
+            mutilply(a1, b1, a2, b2);
+            divide(a1, b1, a2, b2);
+        }
+    }
+
+    public static void tackle(long a, long b) {
+        if (a == 0) {
+            System.out.print(0);
+            return;
+        }
+
+        boolean isMinus = a > 0 ? false : true;
+        if (isMinus) {
+            System.out.print("(-");
+            a = -a;
+        }
+
+        long gcd = getGcd(a, b);
+        a = a / gcd;
+        b = b / gcd;
+        if (a % b == 0) {
+            System.out.print(a / b);
+        } else if (Math.abs(a) > b) {
+            System.out.print(a / b + " " + (a % b) % b + "/" + b);
+        } else if (a == b) {
+            System.out.print(1);
+        } else {
+            System.out.print(a + "/" + b);
+        }
+
+        if (isMinus) {
+            System.out.print(")");
+        }
+
+    }
+
+    public static void divide(long a1, long b1, long a2, long b2) {
+        tackle(a1, b1);
+        System.out.print(" / ");
+        tackle(a2, b2);
+        System.out.print(" = ");
+        if (a2 == 0) {
+            System.out.print("Inf");
+        } else if (a2 < 0) {
+            tackle(-1 * a1 * b2, -1 * a2 * b1);
+        } else {
+            tackle(a1 * b2, a2 * b1);
+        }
+    }
+
+    public static void mutilply(long a1, long b1, long a2, long b2) {
+        tackle(a1, b1);
+        System.out.print(" * ");
+        tackle(a2, b2);
+        System.out.print(" = ");
+        tackle(a1 * a2, b1 * b2);
+        System.out.println();
+    }
+
+    public static void minus(long a1, long b1, long a2, long b2) {
+        tackle(a1, b1);
+        System.out.print(" - ");
+        tackle(a2, b2);
+        System.out.print(" = ");
+        tackle(a1 * b2 - a2 * b1, b1 * b2);
+        System.out.println();
+    }
+
+    public static void add(long a1, long b1, long a2, long b2) {
+        tackle(a1, b1);
+        System.out.print(" + ");
+        tackle(a2, b2);
+        System.out.print(" = ");
+        tackle(a1 * b2 + a2 * b1, b1 * b2);
+        System.out.println();
+    }
+
+    public static long getGcd(long a, long b) {
+        while (a % b != 0) {
+            long temp = a % b;
+            a = b;
+            b = temp;
+        }
+        return b;
+    }
+}
+
