CPP learning notes 1 a simple small program and some knowledge points

The cpp I bought today has been re-learning CPP since today. Now I find that the books published by the school are not exactly the same.

<Em> # include <stdio. h> // pre-processing command int main ()/* The first called function can be compared to a house door (), which indicates that main is a function. int indicates the type of the returned value */{int num;/* declaration statement. It declares two things. One variable named num and the other variable named int indicates that the life variable is an integer. Int Is a keyword. Num is a identifier */num = 1; // assign printf ("I am simple") to the variable. // call the printf function. () parentheses indicate that printf is a function name. Main calls the printf function string as the function parameter printf ("computer"); printf ("WY favority number is % d", num); Return 0; // Return Statement} // The curly arc indicates the boundary of the main function. </em>

Below are some small knowledge points

Features of a C Language

1 portability

2. Powerful functions and flexibility

3 For programmers

Basic Principles of the second computer

Commands-translation commands-execution commands-storage commands

Human-Computer Interaction Process: User-application software-Operating System-hardware equipment

Step 7 of C language application

1. Define the program objectives

2. Design Procedure

3. write code

4. Compile

5 testing and debugging

6. Maintain and modify programs

7. Conclusion

CPP learning notes 1 a simple small program and some knowledge points