feat : C++ 11 added

0xNILADRI · 0xNILADRI · commit c053d1cb97dd · 2021-06-16T01:32:05.000+05:30
diff --git a/20.C++ 11/1_lambda_expression.cpp b/20.C++ 11/1_lambda_expression.cpp
@@ -0,0 +1,10 @@
+# include<iostream>
+using namespace std;
+    
+int main(){
+
+	[](int x,int y){
+	 	cout<<"sum is "<<x+y<<endl;
+	}
+	(10,30);
+}
diff --git a/20.C++ 11/2_shared_pointer.cpp b/20.C++ 11/2_shared_pointer.cpp
@@ -0,0 +1,28 @@
+# include<iostream>
+# include<memory>
+using namespace std;
+    
+class rectangle
+{
+	int length;
+    int breadth;
+    public:
+        rectangle(int l,int b){
+            length=l;
+            breadth=b;
+        }
+        int area(){
+            return length*breadth;
+        }
+};
+
+int main()
+{
+	shared_ptr<rectangle> ptr(new rectangle(10,5));
+	cout<<ptr->area()<<endl;
+	shared_ptr<rectangle> ptr2;
+	ptr2=ptr;
+	cout<<"ptr2 "<<ptr2->area()<<endl;
+	cout<<"ptr "<<ptr->area()<<endl;
+	cout<<ptr.use_count()<<endl;
+}
diff --git a/20.C++ 11/3_unique_pointer.cpp b/20.C++ 11/3_unique_pointer.cpp
@@ -0,0 +1,26 @@
+# include<iostream>
+# include<memory>
+using namespace std;
+    
+
+class rectangle{
+	int length;
+    int breadth;
+    public:
+	rectangle(int l,int b){
+		length=l;
+	    breadth=b;
+	}
+    int area(){
+		return length*breadth;
+	}
+};
+
+int main(){
+	unique_ptr<rectangle> ptr(new rectangle(10,5));
+	cout<<ptr->area()<<endl;
+	unique_ptr<rectangle> ptr2;
+	ptr2=move(ptr);
+	cout<<ptr2->area();
+	cout<<ptr->area();   
+}
diff --git a/20.C++ 11/4_inclass_initializer.cpp b/20.C++ 11/4_inclass_initializer.cpp
@@ -0,0 +1,17 @@
+# include<iostream>
+# include<memory>
+using namespace std;
+    
+class test{
+	int x=10;
+    int y=13;
+    public:
+	    test(int a,int b){
+            x=a;
+            y=b;
+        }
+        test():test(1,1)
+        {}
+};
+int main()
+{}
diff --git a/20.C++ 11/5_demo_ellipses.cpp b/20.C++ 11/5_demo_ellipses.cpp
@@ -0,0 +1,20 @@
+# include<iostream>
+# include<cstdarg>
+using namespace std;
+    
+int sum(int n,...)
+{
+	va_list list;
+	va_start(list,n);
+	int x;
+	int s=0;
+	for(int i=0;i<n;i++){
+		x=va_arg(list,int);
+		s+=x;
+	}
+	return s;
+}
+int main(){
+	cout<<sum(3,10,20,30)<<endl;
+	cout<<sum(5,1,2,3,4,5)<<endl;
+}
