1.课程设计目的
1.更好的理解c语言的相关实现内容,对于c语言的理解得到更好的帮助。
2.实现更方便快捷的应用。
2.基本要求
(1)、1.每组完成1个题目的设计;每人独立完成该题目的一个功能模块的实现,并将课程设计报告打印、装订提交。
(2).使用标准c语言编制程序,源代码必须采用锯齿型书写格式,必须上机调试通过。运行界面友好,易于操作。 (3).输出要求: 1)
应用程序正常运行后,要在屏幕上显示一个文字菜单;2)
要求用户输入数据时,要给出清晰、明确的提示信息,包括输入的数据内容、格式等;3)为各项操作功能设计一个菜单,应用程序运行后,先显示这个菜单,然后用户通过菜单项选择希望进行的操作项目。
(4).必须实现所要求的全部功能。 (5).课程设计要求独立完成,不得抄袭。若发现抄袭行为,则成绩一律记零分。
3.任务完成情况
1.可以通过程序实现学生信息的增加删除显示查找以及修改功能。
2.通过非链表的方式运用结构体的方法编写程序。
4.设计报告
4.1需求分析
4.1.1用户需求分析
(1)、可以快速度的找出输入的学生的所有信息。 (2)、可以精确的找出某个学生的所有信息。 (3)、需要准确的修改某个学生的成绩。
4.2概要设计
1.增加信息。
2.显示信息。
3.查找信息。
4.删除信息。
5.修改信息。
4.3详细设计
4.3.1程序流程图
4.4详细代码
4.4.1结构体定义
typedef struct//定义了一个结构体变量 { char stu_name[10]; //表示姓名 int
stu_id; //表示学号 double stu_math; //高数成绩 double
stu_english; //大学英语成绩 } student;
4.4.2主函数
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
4.4.3初始化函数
student all_stu[10]; int stu_number=0;//定义了学生的人数 int main()
4.4.4显示菜单函数
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void first(); //一号条件 void secend();//二号条件 void third();//三号条件
void fourth(); //四号条件 void fifth(); int q; do printf("\n\n\n\n
printf ( "\t\t=学生成绩管理系统\n" );
printf ("\t\t*
\n "); printf(" \t\t 1. 输入学生成绩 \n "); printf(" \t\t 2. 查找学生成绩 \n "); printf(" \t\t 3. 显示所有成绩 \n "); printf(" \t\t 4. 删除学生成绩 \n "); printf(" \t\t 5. 修改学生成绩 \n "); printf(" \t\t 0. 退出管理系统 \n "); printf(" \t\t printf ("\t\t=========================================\n);
printf ( "\t\t输入你的选项:" ); scanf ( "%d" ,&q); switch (q) { case 1:
first();
printf (“按任意键回菜单”);
getchar ();
system (“cls”); //表示转移号
break ; case 2:
secend();
getchar ();
printf (“按任意键回菜单”);
getchar ();
system (“cls”);
break ; case 3: third(); getchar (); printf ( "\n请按任意键返回主菜单\n" ); getchar (); system (“cls”); break ;
case 4: fourth(); getchar (); printf ( "\n按任意键返回主菜单\n" );
getchar (); system (“cls”); break ; case 5:
fifth();
getchar ();
printf ( "\n按任意键回主菜单\n" );
getchar ();
system (“cls”);
break ; } } while (q); return 0;
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4.4.5显示各个功能函数
4.4.5.1增加信息
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void first()
{
thefirst:
system ( "cls" );
printf ("************输入学生信息**********);
printf ( "\n\n" );
int cw,temp,hh;
char op;
stu_number++;
printf ( "\n>>>>>>>>请输入姓名: " );
scanf ( "%s" ,all_stu[stu_number].stu_name);
printf ( "\n>>>>>>>>请输入学号: " );
scanf ( "%d" ,&temp);
all_stu[stu_number].stu_id=temp;
getchar (); //接收一个空格
printf ( "\n>>>>>>请输入高等数学成绩(小于等于100):" );
scanf ( "%lf" ,&all_stu[stu_number].stu_math);
if (all_stu[stu_number].stu_math> 100)
{
printf ( "输入有误,请输入正确的成绩信息,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefirst;
}
printf ( "\n>>>>>>>>请输入大学英语成绩(小于等于100):" );
scanf ( "%lf" , &all_stu[stu_number].stu_english);
if (all_stu[stu_number].stu_english> 100)
{
printf ( "输入有误,请输入正确的成绩信息,请按(y)重新输入: " );
getchar (); //接收y
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefirst;
}
thefirstone:
printf ( "\n是否继续输入,如是请按(y),否请按(n): " );
getchar ();
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefirst;
if (op == 'n' || op == 'n' )
goto thefirstend;
else
goto thefirstone;
getchar ();
thefirstend:;
getchar (); //输入任意数结束
}
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4.4.5.2查找信息
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void fourth()
{
thefourth:
system ( "cls" );
printf ( "\n\n\n\n********************删除学生成绩**********************" );
int num,cw,cx,ai,i=0;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号: " );
scanf ( "%d" ,&num);
for (ai=1;ai<=stu_number;ai++)
{
if (num==all_stu[ai].stu_id)
{
i=1;
break ;
}
}
if (i==0)
{
printf ( "未查找到要删除的学生信息,是否要重新输入,如需要重新输入请按(y),如不需要请按(n)将返回主菜单: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefourth; //回到开始
if (cw == 'n' || cw == 'n' )
goto thefourthend; //回到结尾
}
else
{
stu_number--; //人数减一
for (;ai<stu_number;ai--)
{
all_stu[ai] = all_stu[ai+1]; //后面的数据往前推
}
}
printf ( "\n\n此学号的学生成绩信息已删除" );
getchar ();
thefourthone:
getchar ();
printf ( "\n删除的成绩信息以删除,是否继续?\n需要请(y),如不需要请(n),将返回主界面: " );
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefourth;
if (op == 'n' || op == 'n' )
goto thefourthend;
else
goto thefourthone;
thefourthend:;
}
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4.4.5.3显示信息
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> void third() { thethird: system ( "cls" );
> printf ( "\n\n**************************显示学生信息***********************" );
> int n=1; printf ( "\n\n>>>姓名" ); printf ( "\t学号" ); printf ( "\t高等数学" );
> printf ( "\t大学英语" ); //for (n=0;n<stu_number;n++); do {
> printf ( "\n>>%s" , all_stu[n].stu_name); printf ( "\t%d" ,
> all_stu[n].stu_id); printf ( "\t%.2lf" , all_stu[n].stu_math);
> printf ( "\t%.2lf" , all_stu[n].stu_english); n++; } while
> (n<=stu_number); }
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4.4.5.4删除信息
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void fourth()
{
thefourth:
system ( "cls" );
printf ( "\n\n\n\n********************删除学生成绩**********************" );
int num,cw,cx,ai,i=0;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号: " );
scanf ( "%d" ,&num);
for (ai=1;ai<=stu_number;ai++)
{
if (num==all_stu[ai].stu_id)
{
i=1;
break ;
}
}
if (i==0)
{
printf ( "未查找到要删除的学生信息,是否要重新输入,如需要重新输入请按(y),如不需要请按(n)将返回主菜单: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefourth; //回到开始
if (cw == 'n' || cw == 'n' )
goto thefourthend; //回到结尾
}
else
{
stu_number--; //人数减一
for (;ai<stu_number;ai--)
{
all_stu[ai] = all_stu[ai+1]; //后面的数据往前推
}
}
printf ( "\n\n此学号的学生成绩信息已删除" );
getchar ();
thefourthone:
getchar ();
printf ( "\n删除的成绩信息以删除,是否继续?\n需要请(y),如不需要请(n),将返回主界面: " );
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefourth;
if (op == 'n' || op == 'n' )
goto thefourthend;
else
goto thefourthone;
thefourthend:;
}
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4.4.5.5修改信息
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void fifth() //修改成绩
{
thefifth:
system ( "cls" );
printf ( "**************************修改学生成绩*************************" );
printf ( "\n\n" );
int num,cw,cx,ai,i = 0, cy, temp;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号: " );
scanf ( "%d" , &num);
for (ai=1; ai<=stu_number; ai++)
{
if (num ==all_stu[ai].stu_id)
{
i = 1;
break ;
}
}
if (i == 0)
{
printf ( "未查找到要修改的学生信息,重新输入按y,返回主菜单按n " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifth;
if (cw == 'n' || cw == 'n' )
goto thefifthend;
}
else
{
printf ( "***********************************************************************" );
printf ( "\n*姓名___: " );
printf ( "%s" , all_stu[ai].stu_name);
printf ( "\n*学号___: " );
printf ( "%d" , all_stu[ai].stu_id);
printf ( "\n*高数成绩: " );
printf ( "%.2lf" , all_stu[ai].stu_math);
printf ( "\n*大学英语成绩: " );
printf ( "%.2lf" ,all_stu[ai].stu_english);
printf ( "\n*********************************************************************" );
}
getchar ();
printf ( "\n\n是否确认修改此学生成绩信息?(注:修改后将不可还原)如需修改请按y,如不需修改学生信息请安n返回主菜单: " );
thefifthone:
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
if (cw == 'n' || cw == 'n' )
goto thefifthend;
else
goto thefifthone;
thefifthtwo:
system ( "cls" );
printf ( "\n>>>>>>>>请输入姓名: " );
scanf ( "%s" , all_stu[ai].stu_name);
printf ( "\n>>>>>>>>请输入学号: " );
scanf ( "%d" ,&temp);
all_stu[ai].stu_id = temp;
getchar ();
for (cy = 0; cy < ai; cy++)
{
if (all_stu[ai].stu_id == all_stu[cy].stu_id)
{
printf ( "学号输入错误,如需重新输入请按(y)退出请按(n)" );
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
else
goto thefifthend;
}
}
printf ( "\n>>>>>>>>请输入第一门成绩(小于100): " );
scanf ( "%lf" , &all_stu[ai].stu_math);
if (all_stu[ai].stu_math > 100)
{
printf ( "输入有误,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
}
printf ( "\n>>>>>>>>请输入第二门成绩(小于100): " );
scanf ( "%lf" , &all_stu[ai].stu_english);
if (all_stu[ai].stu_english > 100)
{
printf ( "输入有误,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
}
printf ( "\n\n" );
printf ( "\n ok 此学生成绩信息已修改完成,感谢您的使用。" );
thefifthfanhui:
getchar ();
printf ( "\n成绩信息已修改,是否继续?\n需要请按y,如不需要请按y,将返回主菜单: " );
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefifth;
if (op == 'n' || op == 'n' )
goto thefifthend;
else
goto thefifthfanhui;
thefifthend:;
}
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4.5使用说明
本代码比较简单易懂,蒟蒻也能看懂。
4.6测试结果与分析
主界面如图:
输入信息图示:
查找信息如图:
显示所有信息如图:
删除学生信息:
修改学生信息如图:
4.7参考文献
【1】c语言从入门到精通2020版。
5体会与感想
学习的过程很漫长,只有依靠自己的慢慢摸索,在过程中总结出经验才是学习中最重要的事情。
6附录
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附录
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
int sum;
typedef struct //定义了一个结构体变量
{
char stu_name[10]; //表示姓名
int stu_id; //表示学号
double stu_math; //高数成绩
double stu_english; //大学英语成绩
} student;
student all_stu[10];
int stu_number=0; //定义了学生的人数
int main()
{
void first(); //一号条件
void secend(); //二号条件
void third(); //三号条件
void fourth(); //四号条件
void fifth();
int q;
do
{
printf ( "\n\n\n\n" );
printf ( "\t\t=====================学生成绩管理系统=================\n" );
printf ( "\t\t* *\n" );
printf ( "\t\t* 1. 输入学生成绩 *\n" );
printf ( "\t\t* 2. 查找学生成绩 *\n" );
printf ( "\t\t* 3. 显示所有成绩 *\n" );
printf ( "\t\t* 4. 删除学生成绩 *\n" );
printf ( "\t\t* 5. 修改学生成绩 *\n" );
printf ( "\t\t* 0. 退出管理系统 *\n" );
printf ( "\t\t* 欢迎使用! *\n" );
printf ( "\t\t=======================================================\n" );
printf ( "\t\t输入你的选项:" );
scanf ( "%d" ,&q);
switch (q)
{
case 1:
first();
printf ( "按任意键回菜单" );
getchar ();
system ( "cls" ); //表示转移号
break ;
case 2:
secend();
getchar ();
printf ( "按任意键回菜单" );
getchar ();
system ( "cls" );
break ;
case 3:
third();
getchar ();
printf ( "\n请按任意键返回主菜单\n" );
getchar ();
system ( "cls" );
break ;
case 4:
fourth();
getchar ();
printf ( "\n按任意键返回主菜单\n" );
getchar ();
system ( "cls" );
break ;
case 5:
fifth();
getchar ();
printf ( "\n按任意键回主菜单\n" );
getchar ();
system ( "cls" );
break ;
}
} while (q);
return 0;
}
void first()
{
thefirst:
system ( "cls" );
printf ( "********************************输入学生信息*********************************" );
printf ( "\n\n" );
int cw,temp,hh;
char op;
stu_number++;
printf ( "\n>>>>>>>>请输入姓名: " );
scanf ( "%s" ,all_stu[stu_number].stu_name);
printf ( "\n>>>>>>>>请输入学号: " );
scanf ( "%d" ,&temp);
all_stu[stu_number].stu_id=temp;
getchar (); //接收一个空格
printf ( "\n>>>>>>>>请输入高等数学成绩(小于等于100):" );
scanf ( "%lf" ,&all_stu[stu_number].stu_math);
if (all_stu[stu_number].stu_math> 100)
{
printf ( "输入有误,请输入正确的成绩信息,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefirst;
}
printf ( "\n>>>>>>>>请输入大学英语成绩(小于等于100):" );
scanf ( "%lf" , &all_stu[stu_number].stu_english);
if (all_stu[stu_number].stu_english> 100)
{
printf ( "输入有误,请输入正确的成绩信息,请按(y)重新输入: " );
getchar (); //接收y
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefirst;
}
thefirstone:
printf ( "\n是否继续输入,如是请按(y),否请按(n): " );
getchar ();
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefirst;
if (op == 'n' || op == 'n' )
goto thefirstend;
else
goto thefirstone;
getchar ();
thefirstend:;
getchar (); //输入任意数结束
}
void secend()
{
thesecend:
system ( "cls" );
printf ( "\n\n**************************查找学生成绩*************************" );
int data,cw,j,flag=0;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号:" );
scanf ( "%d" ,&data);
for (j=1;j<=stu_number;j++)
{
if (data==all_stu[j].stu_id)
{
flag=1;
break ;
}
}
if (flag==0)
{
printf ( "未查找到此学号,重新输入请按(y),如不需要请按(n)将返回主菜单: " );
getchar ();
cw= getchar ();
if (cw== 'y' ||cw== 'y' )
goto thesecend;
if (cw == 'n' || cw == 'n' )
goto thesecendend;
}
else
{
for (j=1;j<=stu_number;j++){
printf ( "\n***********************************************" );
printf ( "\n*姓名___: " );
printf ( "%s" ,all_stu[j].stu_name);
printf ( "\n*学号___: " );
printf ( "%d" ,all_stu[j].stu_id);
printf ( "\n*高数_: " );
printf ( "%.2lf" , all_stu[j].stu_math);
printf ( "\n*大学英语_: " );
printf ( "%.2lf" , all_stu[j].stu_english);
printf ( "\n************************************************" );
}
}
thesecendone:
getchar ();
printf ( "\n输入错误,是否继续查阅?\n需要按(y),如不需要按(n),将返回主界面:" );
scanf ( "%c" ,&op);
if (op == 'y' || op == 'y' )
goto thesecend;
if (op == 'n' || op == 'n' )
goto thesecendend;
else
goto thesecendone;
thesecendend:;
}
void third()
{
thethird:
system ( "cls" );
printf ( "\n\n*********************显示学生信息******************************" );
int n=1;
printf ( "\n\n>>>姓名" );
printf ( "\t学号" );
printf ( "\t高等数学" );
printf ( "\t大学英语" );
//for (n=0;n<stu_number;n++);
do
{
printf ( "\n>>%s" , all_stu[n].stu_name);
printf ( "\t%d" , all_stu[n].stu_id);
printf ( "\t%.2lf" , all_stu[n].stu_math);
printf ( "\t%.2lf" , all_stu[n].stu_english);
n++;
} while (n<=stu_number);
}
void fourth()
{
thefourth:
system ( "cls" );
printf ( "\n\n\n\n********************删除学生成绩**********************" );
int num,cw,cx,ai,i=0;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号: " );
scanf ( "%d" ,&num);
for (ai=1;ai<=stu_number;ai++)
{
if (num==all_stu[ai].stu_id)
{
i=1;
break ;
}
}
if (i==0)
{
printf ( "未查找到要删除的学生信息,是否要重新输入,如需要重新输入请按(y),如不需要请按(n)将返回主菜单: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefourth; //回到开始
if (cw == 'n' || cw == 'n' )
goto thefourthend; //回到结尾
}
else
{
stu_number--; //人数减一
for (;ai<stu_number;ai--)
{
all_stu[ai] = all_stu[ai+1]; //后面的数据往前推
}
}
printf ( "\n\n此学号的学生成绩信息已删除" );
getchar ();
thefourthone:
getchar ();
printf ( "\n删除的成绩信息以删除,是否继续?\n需要请(y),如不需要请(n),将返回主界面: " );
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefourth;
if (op == 'n' || op == 'n' )
goto thefourthend;
else
goto thefourthone;
thefourthend:;
}
void fifth() //修改成绩
{
thefifth:
system ( "cls" );
printf ( "**************************修改学生成绩*************************" );
printf ( "\n\n" );
int num,cw,cx,ai,i = 0, cy, temp;
char op;
printf ( "\n>>>>>>>>请输入要查找学生的学号: " );
scanf ( "%d" , &num);
for (ai=1; ai<=stu_number; ai++)
{
if (num ==all_stu[ai].stu_id)
{
i = 1;
break ;
}
}
if (i == 0)
{
printf ( "未查找到要修改的学生信息,重新输入按y,返回主菜单按n " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifth;
if (cw == 'n' || cw == 'n' )
goto thefifthend;
}
else
{
printf ( "***************************************************************************" );
printf ( "\n*姓名___: " );
printf ( "%s" , all_stu[ai].stu_name);
printf ( "\n*学号___: " );
printf ( "%d" , all_stu[ai].stu_id);
printf ( "\n*高数成绩: " );
printf ( "%.2lf" , all_stu[ai].stu_math);
printf ( "\n*大学英语成绩: " );
printf ( "%.2lf" ,all_stu[ai].stu_english);
printf ( "\n***************************************************************************" );
}
getchar ();
printf ( "\n\n是否确认修改此学生成绩信息?(注:修改后将不可还原)如需修改请按y,如不需修改学生信息请安n返回主菜单: " );
thefifthone:
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
if (cw == 'n' || cw == 'n' )
goto thefifthend;
else
goto thefifthone;
thefifthtwo:
system ( "cls" );
printf ( "\n>>>>>>>>请输入姓名: " );
scanf ( "%s" , all_stu[ai].stu_name);
printf ( "\n>>>>>>>>请输入学号: " );
scanf ( "%d" ,&temp);
all_stu[ai].stu_id = temp;
getchar ();
for (cy = 0; cy < ai; cy++)
{
if (all_stu[ai].stu_id == all_stu[cy].stu_id)
{
printf ( "学号输入错误,如需重新输入请按(y)退出请按(n)" );
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
else
goto thefifthend;
}
}
printf ( "\n>>>>>>>>请输入第一门成绩(小于100): " );
scanf ( "%lf" , &all_stu[ai].stu_math);
if (all_stu[ai].stu_math > 100)
{
printf ( "输入有误,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
}
printf ( "\n>>>>>>>>请输入第二门成绩(小于100): " );
scanf ( "%lf" , &all_stu[ai].stu_english);
if (all_stu[ai].stu_english > 100)
{
printf ( "输入有误,请按(y)重新输入: " );
getchar ();
cw = getchar ();
if (cw == 'y' || cw == 'y' )
goto thefifthtwo;
}
printf ( "\n\n" );
printf ( "\n ok 此学生成绩信息已修改完成,感谢您的使用。" );
thefifthfanhui:
getchar ();
printf ( "\n成绩信息已修改,是否继续?\n需要请按y,如不需要请按y,将返回主菜单: " );
scanf ( "%c" , &op);
if (op == 'y' || op == 'y' )
goto thefifth;
if (op == 'n' || op == 'n' )
goto thefifthend;
else
goto thefifthfanhui;
thefifthend:;
}
|
by:一个刚刚学习c语言的大学生~~
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原文链接:https://blog.csdn.net/Waterpaddler/article/details/115678620