Linking

The first question that comes to most peoples minds is Why is linking necessary? The main reason is that many compiled languages come with library rountines which can be added to your
program. Theses routines are written by the manufacturer of the compiler to perform a variety of tasks, from input/output to complicated mathematical functions. In the case of C the standard
input and output functions are contained in a library (stdio.h) so even the most basic program will require a lib rary function. After linking the file extension is .exe which are executable
files.