I am new to C++. Can somebody help me in this problem

how can i evaluate and print the largest number from a series?

One of the most important aspect in learning to program is developing the skill to solve problems. If you are given a series of numbers and were told to pick the one which is largest, you will do this straight away. Think of the procedure which goes in your brain while you do this and try to seperate the steps into the smallest functional units. When you've developed an algorithm, try to write the code for it. If something is wrong, post it here and I'll be glad to help you. Otherwise, doing the task for you will do you more harm than good.