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93 Commits
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<mxPoint x="150" y="550" as="targetPoint"/>
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<mxPoint x="150" y="520" as="sourcePoint"/>
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</mxCell>
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<mxCell id="18" value="结束" style="ellipse;whiteSpace=wrap;html=1;" vertex="1" parent="1">
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<mxGeometry x="90" y="660" width="120" height="70" as="geometry"/>
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<mxCell id="23" value="N" style="text;strokeColor=none;align=center;fillColor=none;html=1;verticalAlign=middle;whiteSpace=wrap;rounded=0;" vertex="1" parent="1">
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</root>
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</mxGraphModel>
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</diagram>
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</mxfile>
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<mxfile host="65bd71144e">
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<diagram id="ID9VlrPP0GZXrZxrXAXf" name="第 1 页">
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<mxGraphModel dx="1072" dy="568" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
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<mxCell id="1" parent="0"/>
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<mxCell id="4" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="2" target="3">
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<mxGeometry relative="1" as="geometry"/>
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</mxCell>
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<mxCell id="2" value="sort_data" style="ellipse;whiteSpace=wrap;html=1;" vertex="1" parent="1">
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<mxGeometry x="240" y="60" width="110" height="70" as="geometry"/>
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</mxCell>
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<mxCell id="6" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="3" target="5">
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<mxGeometry relative="1" as="geometry"/>
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</mxCell>
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<mxCell id="3" value="<span style="color: rgb(51, 51, 51); font-family: &quot;Microsoft YaHei&quot;, Helvetica, &quot;Meiryo UI&quot;, &quot;Malgun Gothic&quot;, &quot;Segoe UI&quot;, &quot;Trebuchet MS&quot;, Monaco, monospace, Tahoma, STXihei, 华文细黑, STHeiti, &quot;Helvetica Neue&quot;, &quot;Droid Sans&quot;, &quot;wenquanyi micro hei&quot;, FreeSans, Arimo, Arial, SimSun, 宋体, Heiti, 黑体, sans-serif; font-size: 16px; text-align: justify; background-color: rgb(255, 255, 255);">对学生成绩按学生学号从小到大排序</span>" style="whiteSpace=wrap;html=1;" vertex="1" parent="1">
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<mxGeometry x="235" y="215" width="120" height="60" as="geometry"/>
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<mxfile host="65bd71144e">
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<diagram id="XrmENeajpscoQa9QB7--" name="第 1 页">
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<mxCell id="1" parent="0"/>
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<mxGeometry relative="1" as="geometry"/>
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</mxCell>
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<mxCell id="2" value="update_data" style="ellipse;whiteSpace=wrap;html=1;" vertex="1" parent="1">
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<mxCell id="6" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="3" target="5">
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<mxGeometry relative="1" as="geometry"/>
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</mxCell>
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</mxCell>
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<mxGeometry relative="1" as="geometry"/>
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</mxCell>
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<mxCell id="5" value="输入姓名，成绩" style="whiteSpace=wrap;html=1;" vertex="1" parent="1">
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<mxCell id="7" value="学生不存在" style="whiteSpace=wrap;html=1;" vertex="1" parent="1">
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</mxCell>
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</mxCell>
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</mxCell>
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<mxGeometry x="345" y="185" width="30" height="30" as="geometry"/>
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</mxCell>
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<mxCell id="13" value="" style="endArrow=classic;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;" edge="1" parent="1" source="7">
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<mxGeometry width="50" height="50" relative="1" as="geometry">
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<mxPoint x="400" y="450" as="sourcePoint"/>
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<mxPoint x="250" y="490" as="targetPoint"/>
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<Array as="points">
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<mxPoint x="490" y="490"/>
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</Array>
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</mxGeometry>
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</mxCell>
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</root>
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</mxGraphModel>
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</diagram>
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</mxfile>
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#define NAME_LEN 31
|
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#define MAX_PARTS 100
|
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//保存学生成绩信息的结构
|
||||
struct students
|
||||
{
|
||||
int number;
|
||||
char name[NAME_LEN + 1];
|
||||
int score;
|
||||
};
|
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static struct students stu[MAX_PARTS];
|
||||
static int num_parts = 0;
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
//定义常量
|
||||
#define CMD_QUIT 0
|
||||
#define CMD_QUERY 4
|
||||
#define CMD_INSERT 5
|
||||
#define CMD_UPDATE 6
|
||||
#define CMD_DELETE 7
|
||||
#define CMD_READ 1
|
||||
#define CMD_SAVE 2
|
||||
#define CMD_PRINT 3
|
||||
#define CMD_SORT 8
|
||||
#define CMD_CHART 9
|
||||
// 菜单命令的编号
|
||||
|
||||
// 函数声明
|
||||
void init(void);
|
||||
void quit(void);
|
||||
void display_menu(void);
|
||||
int make_choice(void);
|
||||
void read_data(void); // 读取
|
||||
void save_data(void); // 保存
|
||||
void print_data(void); // 打印
|
||||
void query_data(void); // 查询
|
||||
void add_data(void); // 添加
|
||||
void update_data(void); // 修改
|
||||
void delete_data(void); // 删除
|
||||
void sort_data(void); // 排序
|
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void make_chart(void); // 图表
|
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int confirm(const char *msg);
|
||||
|
||||
// 主程序
|
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int main(void)
|
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{
|
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init(); // 程序启动
|
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while (1)
|
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{
|
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display_menu();
|
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int c = make_choice();
|
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switch (c)
|
||||
{
|
||||
case CMD_QUERY:
|
||||
query_data();
|
||||
break;
|
||||
case CMD_INSERT:
|
||||
add_data();
|
||||
break;
|
||||
case CMD_UPDATE:
|
||||
update_data();
|
||||
break;
|
||||
case CMD_DELETE:
|
||||
delete_data();
|
||||
break;
|
||||
case CMD_READ:
|
||||
read_data();
|
||||
break;
|
||||
case CMD_SAVE:
|
||||
save_data();
|
||||
break;
|
||||
case CMD_PRINT:
|
||||
print_data();
|
||||
break;
|
||||
case CMD_SORT:
|
||||
sort_data();
|
||||
break;
|
||||
case CMD_CHART:
|
||||
make_chart();
|
||||
break;
|
||||
default:
|
||||
puts("命令错误，请重新选择");
|
||||
break;
|
||||
case CMD_QUIT:
|
||||
if (confirm("确定要退出吗？"))
|
||||
quit(); // 仅在确认后退出
|
||||
break;
|
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}
|
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}
|
||||
return 0;
|
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}
|
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|
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// 函数定义
|
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void init(void)
|
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{
|
||||
puts("程序启动");
|
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}
|
||||
void quit(void)
|
||||
{
|
||||
puts("程序退出");
|
||||
exit(EXIT_SUCCESS);
|
||||
}
|
||||
void display_menu(void)
|
||||
{
|
||||
printf("\n%d 读取 | %d 保存 | %d 打印 | %d 查询 | %d 添加\n%d 修改 | %d 删除 | %d 排序 | %d 图表 | %d 退出\n\n", CMD_READ, CMD_SAVE, CMD_PRINT, CMD_QUERY, CMD_INSERT, CMD_UPDATE, CMD_DELETE, CMD_SORT, CMD_CHART, CMD_QUIT);
|
||||
}
|
||||
int make_choice(void)
|
||||
{
|
||||
int c; // 用户输入
|
||||
int n = 0; // 正确读入的数据项个数
|
||||
while (n == 0)
|
||||
{
|
||||
printf("请选择：");
|
||||
n = scanf("%d", &c); // 尝试读入整数 c
|
||||
scanf("%*[^\n]"); // 跳过一行中剩余的字符
|
||||
}
|
||||
return c;
|
||||
}
|
||||
|
||||
//查询
|
||||
void query_data(void)
|
||||
{
|
||||
int num;
|
||||
printf("输入学生学号： ");
|
||||
scanf("%d", &num);
|
||||
int f = -1;
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
if (num == stu[i].number)
|
||||
{
|
||||
f = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (f == -1)
|
||||
{
|
||||
printf("学生不存在");
|
||||
}
|
||||
else
|
||||
{
|
||||
printf("学生学号：%d\n", stu[f].number);
|
||||
printf("学生姓名：%s\n", stu[f].name);
|
||||
printf("学生成绩：%d\n", stu[f].score);
|
||||
}
|
||||
}
|
||||
|
||||
//打印
|
||||
void print_data(void)
|
||||
{
|
||||
printf("NUMBER | NAME score\n");
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
printf("%d | %s %d\n", stu[i].number, stu[i].name, stu[i].score);
|
||||
}
|
||||
}
|
||||
|
||||
//添加
|
||||
void add_data(void)
|
||||
{
|
||||
int num;
|
||||
printf("输入学生学号：");
|
||||
scanf("%d", &num);
|
||||
int f = 0;
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
if (num == stu[i].number)
|
||||
{
|
||||
f = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (f == 0)
|
||||
{
|
||||
stu[num_parts].number = num;
|
||||
printf("输入学生姓名：");
|
||||
scanf("%s", &stu[num_parts].name);
|
||||
printf("输入学生成绩：");
|
||||
scanf("%d", &stu[num_parts].score);
|
||||
num_parts++;
|
||||
printf("学生 %d 添加成功\n", num);
|
||||
}
|
||||
else
|
||||
{
|
||||
printf("学生已存在");
|
||||
}
|
||||
}
|
||||
|
||||
//修改
|
||||
void update_data(void)
|
||||
{
|
||||
int num;
|
||||
printf("输入学生学号：");
|
||||
scanf("%d", &num);
|
||||
int f = 0;
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
if (num == stu[i].number)
|
||||
{
|
||||
f = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (f == 0)
|
||||
{
|
||||
printf("学生不存在");
|
||||
}
|
||||
else
|
||||
{
|
||||
printf("输入学生学号：");
|
||||
scanf("%d", &stu[num].number);
|
||||
printf("输入学生姓名：");
|
||||
scanf("%s", stu[num].name);
|
||||
printf("输入学生成绩：");
|
||||
scanf("%d", &stu[num].score);
|
||||
printf("学生 %d 已更新", num);
|
||||
}
|
||||
}
|
||||
|
||||
//删除
|
||||
void delete_data(void)
|
||||
{
|
||||
int num;
|
||||
printf("输入学生学号：");
|
||||
scanf("%d", &num);
|
||||
int f = 0, i, j;
|
||||
for (i = 0; i < num_parts; i++)
|
||||
{
|
||||
if (num == stu[i].number)
|
||||
{
|
||||
f = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (f == 0)
|
||||
{
|
||||
printf("学生不存在");
|
||||
}
|
||||
else
|
||||
{
|
||||
for (j = i; j < num_parts - 1; j++)
|
||||
{
|
||||
stu[j] = stu[j + 1];
|
||||
}
|
||||
num_parts--;
|
||||
printf("删除成功");
|
||||
}
|
||||
}
|
||||
|
||||
void read_data(void)
|
||||
{
|
||||
puts("读取数据");
|
||||
printf("请输入文件名");
|
||||
char filename[256];
|
||||
scanf("%s", filename);
|
||||
|
||||
FILE *fp = fopen(filename, "r");
|
||||
if (fp == NULL)
|
||||
{
|
||||
perror(filename);
|
||||
return;
|
||||
}
|
||||
int i = 0;
|
||||
while (fscanf(fp, "%d,%[^,],%d", &stu[i].number, stu[i].name, &stu[i].score) == 3)
|
||||
{
|
||||
i++;
|
||||
}
|
||||
fclose(fp);
|
||||
num_parts = i;
|
||||
printf("读取 %d 记录\n", num_parts);
|
||||
}
|
||||
|
||||
void save_data(void)
|
||||
{
|
||||
puts("保存数据");
|
||||
printf(" 请输入文件名");
|
||||
char filename[256];
|
||||
scanf("%s", filename);
|
||||
FILE *fp = fopen(filename, "r");
|
||||
if (fp == NULL)
|
||||
{
|
||||
perror(filename);
|
||||
return;
|
||||
}
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
fprintf(fp, "%d,%s,%d\n", stu[i].number, stu[i].name, stu[i].score);
|
||||
}
|
||||
fclose(fp);
|
||||
printf("保存%d 成功", num_parts);
|
||||
}
|
||||
|
||||
//排序
|
||||
void sort_data(void)
|
||||
{
|
||||
printf("排序\n");
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
int change = 0;
|
||||
static struct students t;
|
||||
for (int j = 0; j < num_parts - i - 1; j++)
|
||||
{
|
||||
if (stu[j].number > stu[j + 1].number)
|
||||
{
|
||||
t = stu[j + 1];
|
||||
stu[j + 1] = stu[j];
|
||||
stu[j] = t;
|
||||
change = 1;
|
||||
}
|
||||
}
|
||||
if (!change)
|
||||
break;
|
||||
}
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
int change = 0;
|
||||
static struct students t;
|
||||
for (int j = 0; j < num_parts - i - 1; j++)
|
||||
{
|
||||
if (stu[j].score > stu[j + 1].score)
|
||||
{
|
||||
t = stu[j + 1];
|
||||
stu[j + 1] = stu[j];
|
||||
stu[j] = t;
|
||||
change = 1;
|
||||
}
|
||||
}
|
||||
if (!change)
|
||||
break;
|
||||
}
|
||||
printf("排序已完成");
|
||||
}
|
||||
|
||||
void make_chart(void)
|
||||
{
|
||||
printf("NUMBER | NAME score\n");
|
||||
for (int i = 0; i < num_parts; i++)
|
||||
{
|
||||
printf("%d | %s ", stu[i].number, stu[i].name);
|
||||
for (int j = 0; j < stu[i].score; j++)
|
||||
{
|
||||
printf("*");
|
||||
}
|
||||
printf("\n");
|
||||
}
|
||||
printf("图表\n");
|
||||
}
|
||||
|
||||
int confirm(const char *msg)
|
||||
{
|
||||
char c = 'n'; // 默认选择是 no
|
||||
printf("%s(Y/N): ", msg); // 提示输入 yes/no 进行确认
|
||||
scanf(" %c%*[^\n]", &c); // 读取第一个字符，忽略剩余字符
|
||||
return c == 'y' || c == 'Y'; // 返回确认结果
|
||||
}
|
||||
Loading…
Reference in new issue