This is for making computation faster in C++

Well i think that when ever needed we can make multiplications faster and divisions also by suing shifting instead of using the mul. So let us consider for the 3*k+1 problem in computer science. It says

1)Ask user for a number K 2)if K is even K<-K/2 else K<-3*K+1 4)Check if K is equal to 1 Else go to step 2 again Here the 3*K+1 and K/2 can be performed in the following manner:

K+=(K<<1)+1;//This is 3*K+1 and K=K>>1;//This is K/2

btw Most compilers will automatically convert k/2 into k>>1. So it often better to leave it in the more readable form. 8)