Debuged

.vs/ProjectSettings.json

@@ -0,0 +1,3 @@
+{
+  "CurrentProjectSetting": "No Configurations"
+}

.vs/VSWorkspaceState.json

@@ -0,0 +1,6 @@
+{
+  "ExpandedNodes": [
+    ""
+  ],
+  "PreviewInSolutionExplorer": false
+}

1.cpp

@@ -2,24 +2,24 @@
 using namespace std;
 
 class container {
-
+protected:
 	int size;
 public:
 	float* p;
 	container(int s) :size(s){}
-	const int& getsize() { return size;}
+	int& getsize() { return size;}
 
 };
 
 class vector :public container {
 
 	int call_num;
 public:
-	explicit vector(int l) :len(l),size(1 * 100){
+	explicit vector(int l) :len(l),container(1 * 100){
 		p = new float();
 	}
 	int len;
-	int& getlen() const {
+	int& getlen() {
 		call_num ++;
 		return len;
 	}
@@ -29,12 +29,13 @@ class vector :public container {
 int main() {
 
 	container c1(100);
-	vector v1 = c1;
+	vector vc1(1);
+	vector v1 = vc1;
 	container& r1 = v1;
 	container c2 = 100;
 	c2.getsize() = 20;
 	cout << c2.getsize();
-	vector v2 = 100;
-	v2.getlen = 40;
+	vector v2 ( 100);
+	v2.getlen() = 40;
 	cout << v2.getlen();
 }

3.cpp

@@ -1,4 +1,4 @@
-#include<stdio.h>
+#include<stdio.h>
 #include<stdlib.h>
 #define MAX_SIZE 200
 int arr[MAX_SIZE];
@@ -97,7 +97,7 @@ int average()
 	return sum / count;
 }
 
-void main()
+int main()
 {
 	int cmd;
 	long long int x;
@@ -133,4 +133,5 @@ void main()
 			exit(0);
 		}
 	}
+	return 0;
 }