Computer system Overview One

One, the information is bit + context

1. The Code source program is a bit sequence consisting of a 0 and a 1, and 8 bits are made up of 1 groups, called bytes. Each byte represents a character in the program, which in ASCII is represented by a unique single-byte-size number. The source program is stored in a file in a sequence of bytes.

2. All the information in the system is represented by a string of bits, and the only way to differentiate the data objects is to read the context of the data.

II. Process of program execution (for example, C language)

Because the machine can only read the binary files, and the programmer to write code basic high-level language, so that the computer to execute the program must be converted to a binary file (also known as the executable target program), the process is called compilation. The process of compiling is as follows:

650) this.width=650; "Src=" http://img.blog.csdn.net/20161206230500795?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqvc2luyxrfmzqxntc0mtm=/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/ Gravity/center "/>

To compile the system. The process of compiling a program can be divided into 4 steps:

1.

Computer system Overview One