本文实例为大家分享了C语言实现学生信息管理程序的具体代码,供大家参考,具体内容如下
目前只有5个功能
1. 增加学生信息
2. 删除学生信息
3. 查询某学生信息
4. 列出所有学生信息
5. 按出生日期先后输出学生信息
代码:
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#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct StuInfo //学生信息
{
char cName[10];
char cSex;
char cNumber[6];
char cTel[13];
int iYear;
int iMonth;
};
typedef struct StuInfo INFO;
void AddStu() //增加学生函数
{
int iLenth;
FILE *fp = NULL;
INFO toAdd; //临时存储新学生信息
system ( "CLS" );
fp = fopen ( "SavedStudents.txt" , "a+" ); //a+读写指针在文件尾
if (fp == NULL)
{
puts ( "Error01" );
getchar (); getchar ();
return ;
}
puts ( "输入信息:\n姓名\t性别\t学号\t出生年月\t手机号" );
scanf ( "%s %c %s %d.%d %s" , toAdd.cName, &toAdd.cSex, toAdd.cNumber, &toAdd.iYear, &toAdd.iMonth, toAdd.cTel);
//合法性判断
if (toAdd.cSex != 'F' &&toAdd.cSex != 'M' ) //性别只能为F或者M
{
puts ( "性别格式错误!请重新输入性别:" );
scanf ( "%c" , &toAdd.cSex);
}
if (toAdd.iYear <= 1980 || toAdd.iYear >= 2017 || toAdd.iMonth>12)
{
puts ( "日期错误!请重新输入出生日期:" );
scanf ( "%d.%d" , &toAdd.iYear, &toAdd.iMonth); //日期格式为1990.1格式
}
iLenth = strlen (toAdd.cTel); //手机号长度
if (iLenth != 11)
{
puts ( "手机号码格式错误!请重新输入手机号:" );
scanf ( "%s" , toAdd.cTel);
}
iLenth = strlen (toAdd.cNumber);
if (iLenth != 5)
{
puts ( "学号格式错误!请重新输入学号:" );
scanf ( "%s" , toAdd.cNumber);
}
//判断结束
fwrite (&toAdd, sizeof (INFO), 1, fp);
fclose (fp);
puts ( "写入成功!" );
puts ( "按回车返回" );
getchar (); getchar ();
return ;
}
void DeleteStu() //通过学号删除学生信息
{
FILE *fp = NULL;
INFO Stu[100];
int i = 0, iCount = 0, iRecord = 0;
char cNumber[6];
system ( "CLS" );
fp = fopen ( "SavedStudents.txt" , "a+" );
if (fp == NULL)
{
puts ( "Error01" );
getchar (); getchar ();
return ;
}
rewind (fp);
puts ( "姓名\t性别\t学号\t出生年月\t手机号" );
for (i = 0, iCount = 0; fread (&Stu[i], sizeof (INFO), 1, fp);++i, ++iCount)
{
printf ( "%s\t%c\t%s\t%d.%d\t\t%s\n" , Stu[i].cName, Stu[i].cSex, Stu[i].cNumber, Stu[i].iYear, Stu[i].iMonth, Stu[i].cTel);
}
fclose (fp);
fp = fopen ( "SavedStudents.txt" , "w+" ); //覆盖重写
rewind (fp);
puts ( "输入要删除学生的学号:" );
scanf ( "%s" , cNumber);
for (i = 0;i<iCount;i++)
{
if ( strcmp (cNumber, Stu[i].cNumber) == 0)
{
iRecord = i;
break ;
}
}
for (i = 0;i<iCount;++i)
{
if (i == iRecord) //删除实质为:不向文件写入该条信息
{
continue ;
}
else
{
fwrite (&Stu[i], sizeof (INFO), 1, fp);
}
}
fclose (fp);
puts ( "删除完成!" );
puts ( "按回车返回" );
getchar (); getchar ();
return ;
}
void GetInfo() //通过学号取得学生信息
{
FILE *fp;
INFO Stu[100];
char cNumber[6];
int iLenth, iCount = 0, i;
system ( "CLS" );
fp = fopen ( "SavedStudents.txt" , "a+" ); //a+读写指针在文件尾
if (fp == NULL)
{
puts ( "Error01" );
getchar (); getchar ();
return ;
}
rewind (fp);
for (; fread (&Stu[iCount], sizeof (INFO), 1, fp);++iCount); //读入并计数
puts ( "输入你要查询的学号:如:Y1001" );
scanf ( "%s" , cNumber);
iLenth = strlen (cNumber);
if (iLenth != 5)
{
puts ( "学号格式错误!" );
puts ( "按回车返回" );
getchar (); getchar ();
return ;
}
for (i = 0;i<iCount;++i)
{
if ( strcmp (Stu[i].cNumber, cNumber) == 0)
{
puts ( "姓名\t性别\t学号\t出生年月\t手机号" );
printf ( "%s\t%c\t%s\t%d.%d\t\t%s\n" , Stu[i].cName, Stu[i].cSex, Stu[i].cNumber, Stu[i].iYear, Stu[i].iMonth, Stu[i].cTel);
break ;
}
if (i == iCount - 1)
{
puts ( "没有找到匹配学号!" );
}
}
puts ( "按回车返回" );
getchar (); getchar ();
return ;
}
void ListAllInfo() //查看所有学生信息
{
FILE *fp = NULL;
INFO Stu[100], Temp;
int iCount = 0, i = 0, j = 0;
system ( "CLS" );
fp = fopen ( "SavedStudents.txt" , "a+" );
if (fp == NULL)
{
puts ( "Error01" );
getchar (); getchar ();
return ;
}
rewind (fp);
for (i = 0, iCount = 0; fread (&Stu[i], sizeof (INFO), 1, fp);++i, ++iCount);
for (i = 0;i<iCount;i++)
{
for (j = 0;j<iCount - 1;j++)
{
if ( strcmp (Stu[j].cNumber, Stu[j + 1].cNumber)>0)
{
Temp = Stu[j];
Stu[j] = Stu[j + 1];
Stu[j + 1] = Temp;
}
}
}
puts ( "姓名\t性别\t学号\t出生年月\t手机号" );
for (i = 0;i<iCount;++i)
{
printf ( "%s\t%c\t%s\t%d.%d\t\t%s\n" , Stu[i].cName, Stu[i].cSex, Stu[i].cNumber, Stu[i].iYear, Stu[i].iMonth, Stu[i].cTel);
}
printf ( "\n共找到[%d]条记录" , iCount);
puts ( "\n按回车返回" );
getchar (); getchar ();
return ;
}
void SortAndOut() //排序学生
{
FILE *fp = NULL;
INFO Stu[100], Temp;
int i, j, iCount = 0;
system ( "CLS" );
fp = fopen ( "SavedStudents.txt" , "a+" );
if (fp == NULL)
{
puts ( "Error01" );
getchar (); getchar ();
return ;
}
rewind (fp);
for (; fread (&Stu[iCount], sizeof (INFO), 1, fp);++iCount); //读入并计数
for (i = 0;i<iCount - 1;++i)
{
for (j = 0;j<iCount - 1;++j)
{
if (Stu[j].iYear>Stu[j + 1].iYear)
{
Temp = Stu[j];
Stu[j] = Stu[j + 1];
Stu[j + 1] = Temp;
}
if (Stu[j].iYear == Stu[j + 1].iYear&&Stu[j].iMonth>Stu[j + 1].iMonth)
{
Temp = Stu[j];
Stu[j] = Stu[j + 1];
Stu[j + 1] = Temp;
}
}
}
puts ( "姓名\t性别\t学号\t出生年月\t手机号" );
for (i = 0;i<iCount;++i)
{
printf ( "%s\t%c\t%s\t%d.%d\t\t%s\n" , Stu[i].cName, Stu[i].cSex, Stu[i].cNumber, Stu[i].iYear, Stu[i].iMonth, Stu[i].cTel);
}
puts ( "按回车返回" );
getchar (); getchar ();
return ;
}
int main()
{
int iChoice;
puts ( "1.增加学生\n2.删除学生\n3.查询学生\n4.显示所有学生信息(默认学号排序)\n5.按出生年月排序输出\n0.退出\n输入选择:" );
scanf ( "%d" , &iChoice);
while (iChoice != 0) //主界面
{
switch (iChoice)
{
case 1:AddStu(); break ;
case 2:DeleteStu(); break ;
case 3:GetInfo(); break ;
case 4:ListAllInfo(); break ;
case 5:SortAndOut(); break ;
default : break ;
}
system ( "CLS" );
puts ( "1.增加学生\n2.删除学生\n3.查询学生\n4.显示所有学生信息(默认学号排序)\n5.按出生年月排序输出\n0.退出\n输入选择:" );
scanf ( "%d" , &iChoice);
}
return 0;
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/YangZuo_Chester/article/details/77164912