From aecc04d003d4fac10ae4063691026b3baec494ac Mon Sep 17 00:00:00 2001
From: Arno <15528622+arno-1@user.noreply.gitee.com>
Date: Sat, 27 Sep 2025 14:45:50 +0800
Subject: [PATCH] Initial commit

---
 doc/README.md                 |  4 ++--
 src/Generator/G_ques.java     |  1 +
 src/Generator/Jun_g_ques.java | 21 ++++++++++++++++++++-
 src/Generator/Pri_g_ques.java |  5 +++++
 src/Generator/Sen_g_ques.java | 20 +++++++++++++++++++-
 src/META-INF/MANIFEST.MF      |  3 +++
 6 files changed, 50 insertions(+), 4 deletions(-)
 create mode 100644 src/META-INF/MANIFEST.MF

diff --git a/doc/README.md b/doc/README.md
index fe253d4..4d798d1 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -28,8 +28,8 @@
 
 ## 题目生成说明
 1. 小学题目2-5个操作数，运算包含+、-、*、\，随机加括号
-2. 初中题目1-5个操作数，运算包含+、-、*、\，随机加平方或开根（至少一个），没有括号
-3. 高中题目1-5个操作数，运算包含+、-、*、\，每一项均为三角函数，随机加平方。
+2. 初中题目1-5个操作数，运算包含+、-、*、\，随机加平方或开根（至少一个），随机加括号
+3. 高中题目1-5个操作数，运算包含+、-、*、\，每一项均为三角函数，随机加平方，随机加括号。
 
 ---
 软件2302&emsp;202326010228&emsp;乔毅凡
\ No newline at end of file
diff --git a/src/Generator/G_ques.java b/src/Generator/G_ques.java
index c3017cb..5a18448 100644
--- a/src/Generator/G_ques.java
+++ b/src/Generator/G_ques.java
@@ -4,4 +4,5 @@ public interface G_ques {
     String g_question();
     String g_type();
     char g_operator();
+    String add_brackets(StringBuilder s,int count);
 }
diff --git a/src/Generator/Jun_g_ques.java b/src/Generator/Jun_g_ques.java
index 8a8585a..4eb84df 100644
--- a/src/Generator/Jun_g_ques.java
+++ b/src/Generator/Jun_g_ques.java
@@ -47,7 +47,7 @@ public class Jun_g_ques implements G_ques{
                 question = new StringBuilder(String.join(" ", parts));
             }
         }
-        return question.toString();
+        return add_brackets(question,count);
     }
 
     @Override
@@ -60,4 +60,23 @@ public class Jun_g_ques implements G_ques{
         char[] op={'+','-','*','/'};
         return op[ra.nextInt(op.length)];
     }
+
+    @Override
+    public String add_brackets(StringBuilder s,int count){
+        String res=s.toString();
+        String[] parts=s.toString().split(" ");
+        if (ra.nextBoolean()&&parts.length!=1) {
+            int num=ra.nextInt(3)+1;
+            for (int i=0;i<num;i++) {
+                int pos = ra.nextInt(count);
+                if (pos==count-1){
+                    pos=pos-1;
+                }
+                parts[pos * 2] = "(" + parts[pos * 2];
+                parts[parts.length-1]=parts[parts.length-1]+")";
+            }
+            res = String.join(" ", parts);
+        }
+        return res;
+    }
 }
diff --git a/src/Generator/Pri_g_ques.java b/src/Generator/Pri_g_ques.java
index 18f4687..3121042 100644
--- a/src/Generator/Pri_g_ques.java
+++ b/src/Generator/Pri_g_ques.java
@@ -36,4 +36,9 @@ public class Pri_g_ques implements G_ques{
         char[] op={'+','-','*','/'};
         return op[ra.nextInt(op.length)];
     }
+
+    @Override
+    public String add_brackets(StringBuilder s,int count){
+        return  s.toString();
+    }
 }
diff --git a/src/Generator/Sen_g_ques.java b/src/Generator/Sen_g_ques.java
index 52bfcd9..9903fad 100644
--- a/src/Generator/Sen_g_ques.java
+++ b/src/Generator/Sen_g_ques.java
@@ -21,7 +21,7 @@ public class Sen_g_ques implements G_ques{
                 question.append(g_trig()).append("(").append(g_angle()).append("°)");
             }
         }
-        return question.toString();
+        return add_brackets(question,count);
     }
 
     @Override
@@ -44,4 +44,22 @@ public class Sen_g_ques implements G_ques{
         String[] angle={"15","22.5","75","105","120","135","150","210","300"};
         return angle[ra.nextInt(angle.length)];
     }
+
+    public String add_brackets(StringBuilder s,int count){
+        String res=s.toString();
+        String[] parts=s.toString().split(" ");
+        if (ra.nextBoolean()&&parts.length!=1) {
+            int num=ra.nextInt(3)+1;
+            for (int i=0;i<num;i++) {
+                int pos = ra.nextInt(count);
+                if (pos==count-1){
+                    pos=pos-1;
+                }
+                parts[pos * 2] = "(" + parts[pos * 2];
+                parts[parts.length-1]=parts[parts.length-1]+")";
+            }
+            res = String.join(" ", parts);
+        }
+        return res;
+    }
 }
diff --git a/src/META-INF/MANIFEST.MF b/src/META-INF/MANIFEST.MF
new file mode 100644
index 0000000..5ee19cb
--- /dev/null
+++ b/src/META-INF/MANIFEST.MF
@@ -0,0 +1,3 @@
+Manifest-Version: 1.0
+Main-Class: Main
+