Take a look at simple input in C++.
We will write a program that prompts the user for a value in miles. The program then converts this value to kilometers and prints it out.

Our conversion program uses variables capable of storing integer values and real values, as well as const variables. Notice that in C++, all variables must be declared before they can be used, but unlike in C, they need not be at the head of a block.

Move your mouse cursor over the highlighted lines of code below for a pop-up discussion of their function.

Click the Exercise link below to convert a simple input/output program in C to C++.
Using IO Stream Exercise