update BigNum

BigNum/src/BigNum.java

@@ -0,0 +1,23 @@
+/**想法
+ * 将大数在进行表示时使用字符串进行表示，计算时转化成数组，进行计算。
+ */
+
+public class BigNum {
+    private String value;
+
+    //获取值
+    public String getValue() {
+        return value;
+    }
+
+    //设置大数值
+    public void setValue(String val) {
+        value = val;
+    }
+
+    //将大数字符串转化成字符数组
+    public char[] toArray() {
+        char[] tArray = new StringBuffer(value).reverse().toString().toCharArray();
+        return tArray;
+    }
+}

BigNum/src/Calc.java

@@ -0,0 +1,20 @@
+public class Calc {
+    private BigNum result;
+    private BigNum remainder;
+
+    public void add(BigNum a, BigNum b) {
+
+    }
+
+    public void sub(BigNum a, BigNum b) {
+
+    }
+
+    public void mul(BigNum a, BigNum b) {
+
+    }
+
+    public void div(BigNum a, BigNum b) {
+
+    }
+}