first commit

何斐奕.cpp

@@ -0,0 +1,163 @@
+/*成绩打印*/
+void PrintScore(Lnode *h)
+{
+ 
+	Lnode *p = h->next;
+	printf("%-14s%-8s%-8s%-8s%-8s%-8s\n","排名", "学号", "姓名", "数学", "英语", "数据结构", "平均绩点");
+	while (p != NULL)
+	{
+		printf("%-14s%-8s%-8d%-8d%-8d%.2f\n", p->ID, p->Name, p->Score[0], p->Score[1], p->Score[2], p->Ave_Sco);
+		p = p->next;
+	}
+}
+ 
+/*成绩修改*/
+void ModifyScore(Lnode *h)
+{
+	Lnode *p = h->next;
+	char name[10], id[15];
+	int Math, English, Datastruct;
+	printf("请输入学生姓名：");
+	scanf("%s", name);
+	printf("请输入学生学号：");
+	scanf("%s", id);
+ 
+	while (p)
+	{
+		if (strcmp(p->Name, name)==0 && strcmp(p->ID, id)==0)
+		{
+			printf("当前学生信息:\n");
+			printf("%-14s%-8s%-8s%-8s%-8s\n", "学号", "姓名", "数学", "英语", "数据结构");
+			printf("%-14s%-8s%-8d%-8d%-8d\n", p->ID, p->Name, p->Score[0], p->Score[1], p->Score[2]);
+			printf("请输入更正后的数学成绩：");
+			scanf("%d", &Math);
+			printf("请输入更正后的英语成绩：");
+			scanf("%d", &English);
+			printf("请输入更正后的数据结构成绩：");
+			scanf("%d", &Datastruct);
+			p->Score[0] = Math;
+			p->Score[1] = English;
+			p->Score[2] = Datastruct;
+			break;
+		}
+		else
+		{
+			p = p->next;
+		}
+	}//while循环结束
+}
+ 
+/*信息查找*/
+void FindInf(Lnode *h)
+{
+	Lnode *p = h->next;
+	char name[10], id[15];
+	printf("请输入学生姓名：");
+	scanf("%s", name);
+	printf("请输入学生学号：");
+	scanf("%s", id);
+ 
+	while (p)
+	{
+		if (strcmp(p->Name, name) == 0 && strcmp(p->ID, id) == 0)
+		{
+			printf("当前学生信息:\n");
+			printf("%-14s%-8s%-8s%-8s%-8s\n", "学号", "姓名", "数学", "英语", "数据结构");
+			printf("%-14s%-8s%-8d%-8d%-8d\n", p->ID, p->Name, p->Score[0], p->Score[1], p->Score[2]);
+			break;
+		}
+		else
+		{
+			p = p->next;
+		}
+	}//while循环结束
+}
+ 
+/*删除*/
+void Delete(Lnode *h)
+{
+	Lnode *p = h, *q;
+	q = p->next;
+	char name[10], id[15];
+	printf("请输入学生姓名：");
+	scanf("%s", name);
+	printf("请输入学生学号：");
+	scanf("%s", id);
+ 
+	while (q)
+	{
+		if (strcmp(q->Name, name) == 0 && strcmp(q->ID, id) == 0)
+		{
+			p->next = q->next;
+			free(q);    //删除p节点		
+			printf("删除成功\n");
+			break;
+		}
+		else
+		{
+			p = p->next;
+			q = q->next;
+		}
+	}//while循环结束
+}
+ 
+/*退出系统*/
+void Quit(Lnode *h)
+{
+	SaveInf(h);    //退出时保存信息
+	exit(0);
+}
+ 
+/*打开文件*/
+void LoadInf(Lnode *h)
+{
+	Lnode *p = h;
+	Lnode *q;   //临时变量 用于保存从文件中读取的信息
+	FILE* file = fopen("./Information.dat", "rb");
+	if (!file)
+	{
+		printf("文件打开失败！");
+		return ;
+	}
+ 
+	/*
+		使用feof判断文件是否为结束要注意的问题：
+			当读取文件结束时，feof函数不会立即设置标志符为-1，而是
+			需要再读取一次后，才会设置。所以要先读一次。
+	*/
+	q = (Lnode *)malloc(sizeof(Lnode));
+	fread(q, sizeof(Lnode), 1, file);
+	while (!feof(file))    //一直读到文件末尾
+	{
+		p->next = q;
+		p = q;
+		q = (Lnode *)malloc(sizeof(Lnode));
+		fread(q, sizeof(Lnode), 1, file);
+	} //while循环结束
+ 
+	p->next = NULL;
+	fclose(file);
+}
+ 
+/*保存信息到文件中*/
+void SaveInf(Lnode *h)
+{
+	Lnode *p = h->next;
+	int flag;
+	FILE* file = fopen("./Information.dat", "wb");
+	if (!file)
+	{
+		printf("文件打开失败！");
+		return;
+	}
+	while (p != NULL)
+	{
+		flag = fwrite(p, sizeof(Lnode), 1, file);   //将p的内容写到文件中
+		if (flag != 1)
+		{
+			break;
+		}
+		p = p->next;
+	}
+	fclose(file);
+}