cout<<"this program cauculates many weird stuff.\npls input the value of a:";
cin>>a;
cout<<"pls input the value of b:";
cin>>b;
cout<<"\nthe value of a+b is:\t"<<a+b<<"\nthe value of a-b is :\t"<<a-b<<"\nthe value of a*b is:\t"<<a*b<<"\nthe value of a/b is :\t"<<a/b<<"\nthe value of a%b is :\t"<<a%b<<"\n";