Update README.md

Author: ComradeProgrammer

README.md

@@ -4,8 +4,8 @@ Final Project of ' Design of Compiler Technology' Course of SCSE,BUAA
 This is the repository for the project of "Design of Compiler Technology".This project contains a simple compiler which can translate a 'C0' language to MIPS assembly language.
 ### About the 'C0 language'
 C0 language is a slightly modified and simplified High-level programming language based on C language. The grammar of this 'C0'  language is LL(1) grammar.<br>
-The Grammar of this C0 language is shown bellow.
-[!](Annotation 2019-09-26 123820.jpg)
+The Grammar of this C0 language is shown bellow.<br>
+[!](https://github.com/ComradeProgrammer/C0_Compiler_BUAA/blob/master/Annotation%202019-09-26%20123820.jpg?raw=true)
 ### About the simple compiler
 This compiler contains a 'frontend' and a 'backend.<br>
 In the front end we implemented Lexical analysis,Grammar analysis ( recursive-descend method), and the fault handling. The front end can translate the original C0 language to midcode.