Basic about cpp

day1.cpp

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+#include<iostream>		//directive process by pre-processor iostream is a headerfile
+using namespace std;	// standard namespace which we use in the code.(All the key words tell like cout are standard)
+int main()				//int main is the function  main is function and int is return type.
+{
+	//in function we perfoam he specific task.
+//	
+//	cout<<"Namasty dunia:)"<<endl;	// ; tell the line/sentence is ended
+//	
+//	return 0;							//return tell the function is end now
+
+	//variables
+	//	int a; 			//variable contain the value 1 and type is integer which store only integer value
+	//	 
+	//	cout<<name<<endl;
+	//	string $name="waris-hayat";
+	//	cout<<$name<<endl;
+	//datatypes
+	//1:primary		2:derived 		3:UserDefined
+	//primary are like int float char double etc..
+	//derived attribute are func array and pointer that derived from primary datatypes etc
+	//userdefined are class structure union enum these datatype defined by the user...
+
+	//	int a=3;			//int take 4 byte's. 1 byte == 8 bit 
+	//	char name='a';				//char only take 1 byte from the memory
+	//	float number=14.3;
+	//	double num=14.5;				// it allow 15 decimal it take 8 byte
+	//	string name="waris-hayat";
+	//	cout<<name;
+	int apple;
+	cout<<"Enter the no of the Apple:";
+	cin>>apple;
+
+	cout<<"The value of Apple is:"<<apple<<endl;
+
+	int a;
+	int b;
+	cout<<"Enter the number for a and b"<<endl;
+	cin>>a;
+	cout<<"The value of A  is "<<a<<endl;
+	cin>>b;
+	cout<<"The value of B  is "<<b<<endl;
+	int temp=0;
+	temp=a;
+	a=b;
+	b=temp;
+	cout<<"The value of A is:"<<a<<endl;
+	cout<<"The value of B is:"<<b<<endl;
+
+
+
+
+
+}