C Language High-speed entry series (IV.)

C Language High-speed entry series (IV.)

C-language arrays

---------Reprint Please specify the Source: Coder-pig

Intimate tip: If the picture is not clear can be right-click Save As, should be very clear;

Note that the above code is to go through it yourself!

Introduction to this section:

Through our previous three series of learning, we have a certain understanding of C language;

It should not be difficult for you to write such a code now:

Enter five students ' scores, then calculate the sum and average, and print out the results!

I believe that we will first define five variables, to store five students ' scores, and then to calculate it!

However, if the required students are not 5 but 20, 50 or many others, do you define a bunch of variables?

This is obviously unwise in C, where we store the same number of data types in a single collection in order!

And such a collection is the sectionto of this array of learning!

Learning Roadmap for this section

1. One-dimensional arrays and two-dimensional arrays:

2. Strings and Arrays of strings

Summary:

The ① array is an ordered set of variables that store the same data type and can be used to access the elements in the array by subscript

② definition of one-dimensional array, initialization and reference

③ two-dimensional arrays for storing tabular data, defining, initializing, and referencing

④ distinguishes between strings and string arrays, strings are stored in a character array, and finally a '

The length of the ⑤ character array is at least greater than the string

⑥ uses sizeof (array name)/sizeof (the data type of the array element) to find the length of the character array

⑦ character array Direct = = The comparison result is a comparative address

⑦ uses the string manipulation functions provided by the STRING.H library:

strcpy (A, A, b) copies the strings of string A to a, overwriting strcat (A, A, A, b): the contents of String B. are spelled back to a

strcmp (A, A, b): A, b two strings from left to right for each character, according to the ASCII code value, the comparison, until the difference or ' ", the termination of the comparison

Assuming the same content, return 0;a greater than B returns a positive integer; A less than B returns a negative integer

Strlen (a): Returns the length of the string, not containing the string's end flag '

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C Language High-speed entry series (IV.)