How can we express it in C language?

Hello! C language is a powerful programming language that can be used to develop various applications. Here are some basic ways to represent C language:

1. Variable declaration and initialization:
   int a; // Declare an integer variable a
   float b = 3.14; // Declare and define a floating-point variable b, with an initial value of 3.14
2. Control structure:
   if the condition is met, then execute the code here; otherwise, execute the code here.
3. Execute the code here in a loop, with i incrementing from 0 to 9.
4. Execute the code inside this loop while the condition is met.
5. Function definition and call:
   int add(int a, int b) {
   return a + b;
   }
   int result = add(3, 4); // Invoking add function with parameters 3 and 4, saving the return value to the result variable.
6. Array:
   int arr[5]; // Declaring an array with 5 elements of integer type
   arr[0] = 1; // Assigning a value of 1 to the first element of the array
7. Pointer:
   int* ptr; // Declare a pointer to an integer variable
   int a = 1;
   ptr = &a; // Point the pointer ptr to the address of variable a
   int b = *ptr; // Assign the value pointed by ptr to variable b

These are just some basic ways of representing C language, C language also has rich library functions and features that can achieve more complex functionalities. Hope this helps you!