diff --git a/Add-nums-with-bitwise.cpp b/Add-nums-with-bitwise.cpp
new file mode 100644
index 0000000..3abd4fb
--- /dev/null
+++ b/Add-nums-with-bitwise.cpp
@@ -0,0 +1,27 @@
+#include <stdio.h>
+int main()
+{
+	int number,number2,sum,carry;
+
+	do{
+		printf("Enter 1st Number: ");
+		scanf("%d",&number);
+
+		printf("Enter 2nd Number: ");
+		scanf("%d",&number2);
+
+		
+		while(number2!=0){
+			sum= number ^ number2;
+			carry= (number & number2)<<1;
+			number=sum;
+			number2=carry;
+		}
+
+		printf("Addition is: %d\n",number);
+
+		
+	}while(true);
+	return 0;
+
+}
diff --git a/matrix calculator.cpp b/matrix calculator.cpp
new file mode 100644
index 0000000..a6a8139
--- /dev/null
+++ b/matrix calculator.cpp	
@@ -0,0 +1,128 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+
+void setmatrix(int array[3][3])
+    {
+        cout<<"Enter Values:\n";
+           for(int i=0;i<3;i++)
+  	      { 
+    	       for(int j=0;j<3;j++) 
+		         {
+	 			    cout<<"("<<i<<","<<j<<")= ";
+	  			    cin>>array[i][j];
+    	          }
+  	       }
+	}
+
+void showmatrix(int array[3][3])
+		{ 
+		 for(int i=0;i<3;i++)
+ 		   {
+   			  for(int j=0;j<3;j++)
+     			 {cout<<array[i][j]<<" ";} 
+     		  cout<<endl;
+ 		   }
+		}
+
+void matrixaddition(int array1[3][3],int array2[3][3])
+ 	 {   
+ 	    int tempvariable;
+ 	    
+      for(int i=0;i<3;i++)
+   		{
+     	 for(int j=0;j<3;j++)
+	   		{
+	      tempvariable=array1[i][j]+array2[i][j];
+   			cout<<tempvariable<<" ";
+       		 }
+         cout<<endl;
+    	}
+  	 }
+void matrixmultiplication(int array1[3][3],int array2[3][3])
+ 	{   
+	  int tempvariable;
+    	for(int i=0;i<3;i++)
+    	{ 
+    	  for(int j=0;j<3;j++) 
+    		{   int sum=0;
+		     	for(int k=0;k<3;k++)
+		  	 {
+    			sum+=array1[i][k]*array2[k][j]; 
+		  	 }
+	       	 tempvariable=sum; 
+	         cout<<tempvariable<<" ";	
+     		}  
+		   cout<<endl;
+		}
+    }
+    
+void matrixsubtraction(int array1[3][3],int array2[3][3])
+ 		{
+ 			int tempvariable;
+			for(int i=0;i<3;i++)
+   		  {
+           	  for(int j=0;j<3;j++)
+	      		{
+	      		tempvariable=array1[i][j]-array1[i][j];
+           		 cout<<tempvariable<<" ";
+          		}
+            cout<<endl;
+    	  }
+		}
+
+void matrixdivision(int array1[3][3],int array2[3][3])
+    {
+    	cout<<"\nCant perform Division in matrices\n";
+    	
+    }  	 
+int main()
+{
+	char c,doagain=' ';
+     int A[3][3], B[3][3];          //Two matrices
+     
+    cout<<"Enter first matrix: \n";
+	 setmatrix(A);
+     
+    cout<<"\nEnter 2nd matrix: \n";
+     setmatrix(B);
+     
+    cout<<"The two matrices are: \n";
+    showmatrix(A);
+    
+    cout<<endl<<endl;
+    showmatrix(B);
+     
+     while(doagain!='n') 
+     {
+	 
+	  cout<<"\nWhich operation do you want to perform(+,-,*,/)? : ";
+      cin>>c;
+   switch(c)
+   {
+   	case '*':
+   		matrixmultiplication(A,B);
+   		break;
+   		
+   	case '+':
+   		matrixaddition(A,B);
+   		break;
+   		
+   	case '-':
+   		matrixsubtraction(A,B);
+   		break;
+   		
+   	case '/':
+   		matrixdivision(A,B);
+   		break;
+   		
+   	default:
+   		cout<<"Invalid operator!!!";
+   		
+   }
+    cout<<"\nDo u want to perform another operation again(y/n)? :";
+     cin>>doagain;
+     }
+   
+   
+}
diff --git a/pointers.cpp b/pointers.cpp
new file mode 100644
index 0000000..32ce12f
--- /dev/null
+++ b/pointers.cpp
@@ -0,0 +1,15 @@
+#include<iostream>
+using namespace std;
+int main()
+{    int h=5; 
+char c='Z';
+	int* v;
+	v=&h;
+	char *b;
+	b=&c;
+	//b=&h; //error1= cannot convert 'int*' to 'char*' in assignment
+     	cout<<"h= "<<h<<endl<<"c= "<<c
+	        <<"\n*v= "<<*v
+		    <<"\n*b= "<<*b<<endl;
+	cout<<"Address of h= "<<v<<"\naddress of c= "<<b;
+	}
diff --git a/prime number.cpp b/prime number.cpp
new file mode 100644
index 0000000..3f5950b
--- /dev/null
+++ b/prime number.cpp	
@@ -0,0 +1,18 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+int main()
+{ int y;
+bool a=true;
+cout<<"Enter any number= ";
+cin>>y;
+for (int x=2;x<y;x++){
+if(y%x==0) 
+{
+ a=false;
+cout<<"is not prime bcoz it is divisible by "<<x;
+break;}
+    }
+ if(a==true)cout<<"Is prime.";   
+getch();
+}
diff --git a/reading files.cpp b/reading files.cpp
new file mode 100644
index 0000000..c585b00
--- /dev/null
+++ b/reading files.cpp	
@@ -0,0 +1,45 @@
+#include<iostream>
+#include<fstream>
+using namespace std;
+int main()
+{
+	ifstream reading("C:/Users/zohaib hassan/Desktop/tuesday/filing/zhs.txt");
+	char data[200];
+	while(!reading.eof())                 //or while(reading
+	{
+		reading.getline(data,200);
+		cout<<data;
+	}
+	
+}
+/* line by line reading:
+ string line;
+ while(getline(reading,line));
+ or
+ //or while(reading
+ 
+ or
+ 	reading.read(data,200);
+ 	reading.getline(data,sizeof(data);
+	 */
+	 
+	 
+	 /*
+	 word by word searching:
+	 
+	 string word;
+	 ifstream readiing("D:....")
+	 while(reading>>word)
+	 {
+	 if(word=="stored")
+	 { 
+	 cout<<word<<endl;  
+	 break;
+	 }
+     }
+	 
+	 reading.good()      //good returns 1 when file is not ended and 0 when file is ended;
+	 
+	 
+	 
+	  */
diff --git a/switch statement.cpp b/switch statement.cpp
new file mode 100644
index 0000000..dbab780
--- /dev/null
+++ b/switch statement.cpp	
@@ -0,0 +1,23 @@
+#include<iostream>
+using namespace std;
+int main()
+{ int a;
+cout<<"enter any integer =";
+cin>>a;
+ switch(a)
+ {   case 60:
+     case 50:       
+//	  if cases r not identified in input then default will be executed.
+     case 40: 
+	 cout<<"A grade";
+	 break;
+	 case 30:
+	 case 20:
+	 	cout<<"D grade.";
+	 	break;
+	 default:
+	 cout<<"Any other grade than \"A\" or \"D\"";
+	 }
+     
+     
+ }
diff --git a/time conversion.cpp b/time conversion.cpp
new file mode 100644
index 0000000..ef88c94
--- /dev/null
+++ b/time conversion.cpp	
@@ -0,0 +1,14 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+int main()
+{ int hours,secs,mins;
+cout<<"Enter no of hours= ";
+cin>>hours;
+mins=hours*60;
+cout<<"Mins in given hours= "<<mins<<endl;
+secs=mins*60;
+cout<<"Seconds in given hours= "<<secs<<endl;
+
+getch();
+}
diff --git a/turnory operator.cpp b/turnory operator.cpp
new file mode 100644
index 0000000..00e26cd
--- /dev/null
+++ b/turnory operator.cpp	
@@ -0,0 +1,12 @@
+#include<iostream>
+#include<conio.h>
+using namespace std;
+int main()
+    //turnory operator works same as if else does but the difference is 
+    //that if else is a control structure and this is an operator and it 
+    //works on three operands i.e the condition, true statement and the false statement simultaneously.
+  { int x;
+  cout<<"Enter an number= ";
+  cin>>x;
+  (x<=9)? cout<<"It is a singe digit.":cout<<"It is not a single digit.";
+	}