The writing of paper information is to turn the high-level language in the paper into a binary language that can be recognized by the computer. The computer only knows 1 and 0, and the compiler turns the familiar language into binary. The process of translating a source program into a target program by a compiler can be divided into five stages: lexical analysis; Grammatical analysis; Semantic checking and intermediate code generation; Code optimization; Object code generation. Mainly lexical analysis and grammatical analysis, also known as source program analysis, in the analysis process, grammatical errors are found and prompt information is given. Different from literal translation language, it uses an interpreter to run the code sentence by sentence, but uses a compiler to compile the code into machine code and then run it. Theoretically, any programming language can be compiled or translated literally. The difference between them is only related to the application of the program.