diff --git a/README.md b/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..b6cf728ed8d375f3390038cfe097b42fa0b93f52
--- /dev/null
+++ b/README.md
@@ -0,0 +1,46 @@
+# disk-file-read-write
+## explain
+* This program realizes the read-write operation of disk file, for example, read the student's score information from scores.txt by line.
+* The student information in the file is as follows
+```
+姓名	数学分析	高等代数	解析几何
+张红	78	94	90
+李丽君	65	73	82
+成平	94	68	78
+王伟	84	86	69
+文锦春	74	92	60
+林黛玉	66	83	70
+付凌云	88	79	82
+岳不群	90	82	93
+令狐冲	81	77	97
+温玉琪	95	84	68
+胡建军	85	73	75
+刘汉	90	87	89
+秋昌平	83	71	74
+秦敖天	96	92	95
+方世杰	83	90	88
+```
+* The next action is to store each line of student information read in the structure studentInfo
+* Then the data in the structure are used to calculate the average score of the course and the average score of each person.
+* The average scores of the courses and the average scores of the students are written into the scoresAnalysis.txt file in a certain format.
+* The situation in the scoresAnalysis.txt file is as follows
+```
+姓名		数学分析	高等代数 	解析几何	平均成绩
+张红		78		94		90		87.3
+李丽君		65		73		82		73.3
+成平		94		68		78		80.0
+王伟		84		86		69		79.7
+文锦春		74		92		60		75.3
+林黛玉		66		83		70		73.0
+付凌云		88		79		82		83.0
+岳不群		90		82		93		88.3
+令狐冲		81		77		97		85.0
+温玉琪		95		84		68		82.3
+胡建军		85		73		75		77.7
+刘汉		90		87		89		88.7
+秋昌平		83		71		74		76.0
+秦敖天		96		92		95		94.3
+方世杰		83		90		88		87.0
+各科平均成绩	83.5		82.2		80.7
+```
+* The last step is to use the file pointer to read and display the contents of the scoresAnalysis.txt by row to the console window