README.md

@@ -307,7 +307,25 @@ void PrintScore(STU stu[],int n,int m)
 ```
 void WritetoFile(STU stu[],int n,int m)
 {
+        FILE *fp;
+        int i, j;
 
+        if((fp = fopen("student.txt","w")) == NULL)
+        {
+                printf("Failure to open score.txt!\n");
+                exit(0);
+        }
+        fprintf(fp, "%d\t%d\n", n, m);    //将学生人数和课程门数写入文件
+        for (i=0; i<n; i++)
+        {
+                fprintf(fp, "%10ld%10s", stu[i].num, stu[i].name);
+                for (j=0; j<m; j++)
+                {
+                        fprintf(fp, "%10.0f", stu[i].score[j]);
+                }
+                fprintf(fp, "%10.0f%10.0f\n", stu[i].sum, stu[i].aver);
+        }
+        fclose(fp);
 }
 ```