How to use the Strcat function to connect 2 arrays in C language

How does the C language use the Strcat function to concatenate 2 arrays?

Today, I had this problem, so I tried it, though it was not a problem to be seen by many big guys, but I would like to make a brief introduction to it.

Here's my code and how it works.

In fact, the simple introduction of a J variable, so that it skips the insertion of the first character array.

This week found a good book: "Mood Dictionary", it is based on each mood English words of the first letter to sort, the author through the story about each mood, to people more vividly introduce a variety of abstract mood.

At the same time, see a book called "Reading Library" of the short story collection, seems to have a lot of this, or slowly look at it, good-looking or will introduce a everyone.

How to use the Strcat function to connect 2 arrays in C language