Beginner of C language beginner code

Example of code for beginners in C language: "Hello, World!" print message. Find the sum of two integers and display the variables, operators and input functions. Calculate the area of ​​a circle, using constants, variables, and mathematical functions.

Beginners with C language beginners

For beginners in C language, writing introductory code is an important step in the programming journey. Here are a few common code examples to help you embark on the C programming path:

“Hello, World!”

This is a classic example of the get started code to output the "Hello, World!" message on the console. The code is as follows:

 <code class="c">#include <stdio.h> int main() { printf("Hello, World!\n"); return 0; }</stdio.h></code>

Find the sum of two integers

This code example shows how to use variables and arithmetic operators to find the sum of two integers. The code is as follows:

 <code class="c">#include <stdio.h> int main() { int num1, num2, sum; printf("请输入第一个整数："); scanf("%d", &num1); printf("请输入第二个整数："); scanf("%d", &num2); sum = num1 num2; printf("两个整数之和为：%d\n", sum); return 0; }</stdio.h></code>

Calculate the area of ​​a circle

This code example shows how to calculate the area of ​​a circle using constants, variables, and mathematical functions. The code is as follows:

 <code class="c">#include <stdio.h> #include <math.h> int main() { const float PI = 3.14159265358979323846; // 定义圆周率常量float radius, area; printf("请输入圆的半径："); scanf("%f", &radius); area = PI * radius * radius; printf("圆的面积为：%.2f\n", area); return 0; }</math.h></stdio.h></code>

These beginner code examples provide a foundation for beginners to understand the basic syntax, data types, and functions of C.

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