README.md

@@ -153,7 +153,25 @@ int main(void)
 ```
 int Menu(void)
 {
-
+   int itemSelected;
+   printf("Management for Students' scores\n");
+   printf("1.Input record\n");
+   printf("2.Calculate total and average score of every course\n");
+   printf("3.Calculate total and average score of evry student\n");
+   printf("4.Sort in descending order by score\n");
+   printf("5.Sort in ascending order by score\n");
+   printf("6.Sort in ascending order by number\n");
+   printf("7.Sort in dictionary order by name\n");
+   printf("8.Search by number\n");
+   printf("9.Search by name\n");
+   printf("10.Statistic analysis\n");
+   printf("11.List record\n");
+   printf("12.Write to a file\n");
+   printf("13.Read from a file\n");
+   printf("0.Exit\n");
+   printf("Please Input your choice:");
+   scanf("%d",&itemSelected);    //读入用户输入
+   return itemSelected;
 }
 ```
 
@@ -169,7 +187,17 @@ void ReadScore(STU stu[],int n,int m)
 ```
 void AverSumofEveryStudent(STU stu[],int n,int m)
 {
-
+   int i,j;
+   for(i=0;i<n;i++)
+   {
+        stu[i].sum = 0;   //初始化每个学生总分为0
+        for(j=0;j<m;j++)
+        {
+                stu[i].sum = stu[i].sum + stu[i].score[j];    //累加分数
+        }
+        stu[i].aver = m>0 ? stu[i].sum /m : -1;   
+        printf("student %d: sum = %.0f,aver = %.0f\n",i+1,stu[i].sum,stu[i].aver);
+   }
 }
 ```
 
@@ -177,8 +205,22 @@ void AverSumofEveryStudent(STU stu[],int n,int m)
 ```
 void AverSumofEveryCourse(STU stu[],int n,int m)
 {
+    int i,j;
+    float sum[COURSE_NUM],aver[COURSE_NUM];
+    /*--------------begin------------*/
+    for(j=0;j<m;j++)
+    {
+        sum[j] = 0;
+        for(i=0;i<n;i++)
+        {
+                sum[j]+= stu[i].score[j];   //计算n个同学每门课程的总分
 
         }
+        aver[j] = sum[j]/i;
+        printf("student %d: sum = %.0f,aver = %.0f\n",j+1, sum[j], aver[j]);
+    }
+    /*--------------------end------------------------*/
+}
 ```
 
 //函数功能：按选择法将数组 sum 的元素值排序