111

README.md

@@ -116,3 +116,141 @@ int Menu(void)
 		scanf("%d", &itemSelected); 	// 读入用户输入 
 		return itemSelected;
 }
+//1 函数功能：输入n个学生的m门课成绩 
+void ReadScore(STU stu[], int n, int m)
+{
+	int i, j;
+	printf("Input student's ID, name and score:\n");
+    /* ---------- begain ---------- */
+    for(i=0;i<n;i++)
+    {scanf("%ld%s",&stu[i].num,stu[i].name);
+     for (j=0; j<m; j++)
+     scanf("%f",&stu[i].score[j]);
+    }
+
+    /* ----------- end ----------- */
+}
+//2
+void AverSumofEveryStudent(STU stu[], int n, int m)
+{
+	int i, j;
+	for (i=0; i<n; i++)
+	{
+	    stu[i].sum = 0;
+	    for (j=0; j<m; j++)
+	    {
+            stu[i].sum = stu[i].sum + stu[i].score[j];
+	    }
+	    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);
+	}	
+}
+
+// 5使数据按升序排序 
+int Ascending(float a, float b)
+{
+	return a < b;      // 这样比较决定了按升序排序，如果a<b，则交换 
+}
+//6
+int Descending(float a, float b)
+{
+	return a > b;
+    }
+// 9交换两个字符串 
+void  SwapChar(char x[], char y[])
+{
+char temp[MAX_LEN];
+strcpy(temp, x);
+strcpy(x, y);
+strcpy(y, temp);
+}
+//10
+void AsSortbyNum(STU stu[], int n, int m)
+{
+    int  i, j, k, t;
+    for (i=0; i<n-1; i++)
+    {
+        k = i;
+        for (j=i+1; j<n; j++)
+        {
+            if (stu[j].num < stu[k].num)    k = j;
+        }
+        if (k != i)
+        {
+            for (t=0; t<m; t++)          
+              {
+                   SwapFloat(&stu[k].score[t], &stu[i].score[t]);
+            }
+SwapFloat(&stu[k].sum, &stu[i].sum);  
+SwapFloat(&stu[k].aver, &stu[i].aver);   
+SwapLong(&stu[k].num, &stu[i].num);     
+SwapChar(stu[k].name, stu[i].name);  
+        }
+    }
+}
+// 15函数功能： 打印学生成绩 
+void PrintScore(STU stu[], int n, int m)
+{
+	int i, j;
+	for (i=0; i<n; i++)
+	{
+		printf("%ld\t%s\t", stu[i].num, stu[i].name);
+		for (j=0; j<m; j++)
+		{
+			printf("%.0f\t", stu[i].score[j]);
+		}
+		printf("%.0f\t%.0f\n", stu[i].sum, stu[i].aver);
+	}
+}
+//16
+void StatisticAnalysis(STU stu[], int n, int m)
+{
+	int  i, j, t[6];
+	for (j=0; j<m; j++)
+	{
+		printf("For course %d:\n", j+1);
+	     memset(t, 0, sizeof(t)); 
+		for (i=0; i<n; i++)
+		{
+			if (stu[i].score[j]>=0 && stu[i].score[j]<60)t[0]++;
+			else if (stu[i].score[j]<70)				   t[1]++;
+			else if (stu[i].score[j]<80)				   t[2]++;
+			else if (stu[i].score[j]<90)				   t[3]++;
+			else if (stu[i].score[j]<100)				   t[4]++;
+			else if (stu[i].score[j] == 100)      		   t[5]++;
+		}
+		for (i=0; i<=5; i++)
+		{
+            if (i==0) printf("<60\t%d\t%.2f%%\n",t[i],(float)t[i]/n*100);
+	       else if (i==5) printf("%d\t%d\t%.2f%%\n",
+(i+5)*10,t[i],(float)t[i]/n*100);
+	       else 	printf("%d-%d\t%d\t%.2f%%\n", 
+(i+5)*10, (i+5)*10+9, t[i], (float)t[i]/n*100);	
+		}
+	}
+}
+//17从文件中读取学生的学号、姓名及成绩等信息写入到结构体数组stu中
+void ReadfromFile(STU stu[],int *n, int *m)
+{
+	FILE *fp;
+	int i, j;
+	if ((fp = fopen("student.txt","r")) == NULL) 
+	{ 
+		printf("Failure to open score.txt!\n");
+		exit(0);
+	}
+     fscanf(fp, "%d\t%d", n, m); // 从文件中读出学生人数和课程门数       
+	for (i=0; i<*n; i++)  //学生人数保存在n指向的存储单元
+	{
+		fscanf(fp, "%10ld", &stu[i].num);
+		fscanf(fp, "%10s", stu[i].name);  
+		for (j=0; j<*m; j++)//课程门数保存在m指向的存储单元
+		{
+			fscanf(fp, "%10f", &stu[i].score[j]);          //不能用%10.0f
+		}
+		fscanf(fp, "%10f%10f", &stu[i].sum, &stu[i].aver);//不能用%10.0f
+	}
+	fclose(fp);		
+}
+````