Home > Article > Backend Development > C Programming Basics: Start with Basic Units
Basics of C language programming: starting from the basic units
As a widely used programming language, C language is the first choice for many programmers to get started. As an intermediate programming language, it has good portability, efficiency and feature richness, so it is very popular among programmers. This article will start with the basic units of C language to introduce its programming foundation, including data types, variables, constants, operators, etc., along with specific code examples to help readers better understand and master the basic knowledge of C language.
In C language, data type is used to define the storage format of data and the operations that can be performed on the data. C language provides some basic data types, such as integer, floating point, character, etc.
Integer type is used to represent integers. In C language, use the keyword int
to declare integer variables. The following is an example code for the definition and assignment of an integer variable:
int num1; // Declare an integer variable num1 = 10; //Assign a value to a variable
Floating point type is used to represent a value with a decimal part. Use the keyword in C language float
to declare floating point variables. The following is a sample code for the definition and assignment of a floating-point variable:
float num2; // Declare a floating-point variable num2 = 3.14; // Assign a value to the variable
Character type is used to represent a single character, and is declared using the keyword char
in C language Character variable. The following is a sample code for the definition and assignment of a character variable:
char ch; // Declare a character variable ch = 'A'; // Assign values to variables
Variables are used to store data that need to be processed when the program is running. In C language, they need to be declared first and then used. The following is a sample code for variable declaration and use:
int a, b, sum; // Declare integer variables a, b, sum a = 10; // Assign a value to variable a b = 20; // Assign a value to variable b sum = a b; // Assign the sum of a and b to the variable sum
A constant is a fixed value, using the keyword ## in C language #const to declare constants. The following is a sample code for the declaration and use of a constant:
int a = 10, b = 20; int sum, difference, product, quotient, remainder; sum = a b; // addition operation difference = a - b; // subtraction operation product = a * b; // multiplication operation quotient = a / b; // division operation remainder = a % b; // Remainder operation
int num = 10; num = 5; // num = num 5; num -= 3; // num = num - 3; num *= 2; // num = num * 2; num /= 4; // num = num / 4;
int x = 10, y = 20; int result; result = (x > y) && (x != 0); // Logical AND operation, if x is greater than y and x is not equal to 0, the result is 1, otherwise it is 0 result = (x < y) || (x == 10); // Logical OR operation, if x is less than y or x is equal to 10, the result is 1, otherwise it is 0
Through the above introduction and Code examples hope that readers can have a clearer understanding of the basic units of C language, and then be able to learn and apply C language programming more deeply. During the learning process, continuous practice and writing code are the keys to improving programming abilities. I hope readers can persevere and master the basic knowledge of C language, so that they can write more efficient and reliable programs. I wish readers success in learning C language!
The above is the detailed content of C Programming Basics: Start with Basic Units. For more information, please follow other related articles on the PHP Chinese website!