以前也找过,做完后没有留底子,这个是以前用到的,应该可以。
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 1000
typedef struct Lesson //定义课程结构体
{
int Lesson_Num;
char Lesson_Name[50];
int Lesson_Mark;
int Lesson_Credit;
}Lesson;
typedef struct Student //定义学生的结构体
{
char Name[50];
int Num;
int Lesson_Count;
Lesson L[20];
}Student;
Student S[MAX];
static int Student_Count = 0; //记录学生数的变量
void PrintInterface(); //打印界面
int AddStudent(); //添加,带返回值,提示操作成功
int DelStudent(); //删除,带返回值,提示操作成功
void CheckStudent(); //查学生成绩
void CheckClass(); //查班成绩表
void WriteFile(); //写入文本文件
void ReadFile(); //读取文本文件
void main()
{
int Choice;
while (1)
{
PrintInterface();
scanf("%d%*c", &Choice); //"%*c"是吸收回车的,因为后面会输入字母类型
if (Choice >= 0 && Choice <= 6) //选择操作合法
{
switch (Choice)
{
case 0: exit(1);
case 1:
{
system("cls");
if (AddStudent()) printf("\n添加成功...回车继续\n");
else printf("\n添加失败...回车继续\n");
getchar();
getchar();
system("cls");
break;
}
case 2:
{
system("cls");
if (DelStudent()) printf("\n删除成功...回车继续\n");
else printf("\n删除失败...回车继续\n");
getchar();
getchar();
system("cls");
break;
}
case 3:
{
system("cls");
CheckStudent();
system("cls");
break;
}
case 4:
{
system("cls");
CheckClass();
system("cls");
break;
}
case 5: WriteFile();system("cls");break;
case 6: ReadFile();system("cls");break;
default:;
}
}
else
{
printf("无此功能..重新选择..回车确定\n"); //选择操作非法
getchar();
system("cls"); //清屏函数
}
}
}
void PrintInterface()
{
printf("\t -------------------------- \n");
printf("\t| 1、添加 |\n");
printf("\t| |\n");
printf("\t| 2、删除 |\n");
printf("\t| |\n");
printf("\t| 3、查学生成绩 |\n");
printf("\t| |\n");
printf("\t| 4、查班成绩表 |\n");
printf("\t| |\n");
printf("\t| 5、写入文本文件 |\n");
printf("\t| |\n");
printf("\t| 6、读取文本文件 |\n");
printf("\t| |\n");
printf("\t| 0、退出 |\n");
printf("\t -------------------------- \n");
printf("\t选择操作:");
}
int AddStudent()
{
int S_count, i, j;
printf("\n添加中......\n");
printf("\n添加学生人数(如1、2 ……999):");
scanf("%d", &S_count);
if (Student_Count + S_count >= MAX) return 0; //超过了数组上限
for (i = Student_Count; i < Student_Count + S_count; i++)
{
printf("\n\t第%d个学生:\n", i - Student_Count + 1);
printf("\n\t学生学号:"); scanf("%d%*c", &S[i].Num);
printf("\n\t学生姓名:"); gets(S[i].Name);
printf("\n\t该学生所修课程数:"); scanf("%d", &S[i].Lesson_Count);
for (j = 0; j < S[i].Lesson_Count; j++)
{
printf("\n\t第%d门课:\n", j + 1);
printf("\n\t\t课程编号:"); scanf("%d%*c", &S[i].L[j].Lesson_Num);
printf("\n\t\t课程名称:"); gets(S[i].L[j].Lesson_Name);
printf("\n\t\t课程成绩:"); scanf("%d", &S[i].L[j].Lesson_Mark);
printf("\n\t\t课程学分:"); scanf("%d", &S[i].L[j].Lesson_Credit);
if (S[i].L[j].Lesson_Mark < 60) S[i].L[j].Lesson_Credit = 0; //不及格的课程学分为0
}
}
Student_Count += S_count;
return 1;
}
int DelStudent()
{
char *D_Name;
int D_Num;
int i, j;
printf("\n填写待删除学生的信息:\n");
printf("\n学生姓名:"); gets(D_Name);
printf("\n学生学号:"); scanf("%d", &D_Num);
for (i = 0; i < Student_Count; i++)
{
if (!strcmp(S[i].Name, D_Name) && S[i].Num == D_Num)
{
printf("\n找到该学生,删除中......\n");
for (j = i + 1; j < Student_Count; j++)
{
S[j - 1] = S[j];
}
break;
}
}
if (i == Student_Count)
{
printf("\n未找到该学生...请核对所填信息\n\n");
return 0;
}
else
{
Student_Count--;
return 1;
}
}
void CheckStudent()
{
int C_Choice;
char C_Name[50];
int C_Num;
int i, j;
printf("\n输入所查学生信息(1.姓名 \\ 2.学号)选择:");
scanf("%d%*c", &C_Choice);
printf("\n查找中......\n");
if (C_Choice == 1 || C_Choice == 2) //选择合法
{
if (C_Choice == 1)
{
printf("\n姓名:"); gets(C_Name);
for (i = 0; i < Student_Count; i++) //全部穷举,防止同名同姓
{
if (!strcmp(S[i].Name, C_Name))
{
printf("\n学号:%d\t姓名:%s\n", S[i].Num, S[i].Name);
printf("\n课程编号\t课程名称\t课程成绩\t课程学分\n");
printf("-----------------------------------------------------\n");
for (j = 0; j < S[i].Lesson_Count; j++)
{
printf("%d\t\t%s\t\t%d\t\t%d\n", S[i].L[j].Lesson_Num,
S[i].L[j].Lesson_Name, S[i].L[j].Lesson_Mark,
S[i].L[j].Lesson_Credit);
printf("-----------------------------------------------------\n");
}
printf("\n\n");
}
}
}
else
{
printf("\n学号:"); scanf("%d%*c", &C_Num);
for (i = 0; i < Student_Count; i++) //不用全部穷举,学号唯一
{
if (S[i].Num == C_Num)
{
printf("\n学号:%d\t姓名:%s\n", S[i].Num, S[i].Name);
printf("\n课程编号\t课程名称\t课程成绩\t课程学分\n");
printf("-----------------------------------------------------\n");
for (j = 0; j < S[i].Lesson_Count; j++)
{
printf("%d\t\t%s\t\t%d\t\t%d\n", S[i].L[j].Lesson_Num,
S[i].L[j].Lesson_Name, S[i].L[j].Lesson_Mark,
S[i].L[j].Lesson_Credit);
printf("-----------------------------------------------------\n");
}
printf("\n\n");
break;
}
}
}
printf("查找完毕...回车继续\n");
getchar();
}
else //选择不合法
{
printf("选择错误...回车继续\n");
getchar();
return;
}
}
void CheckClass()
{
int C_LNum;
double SSNum = 0, PassSNum = 0, SMark = 0;
int i, j;
printf("\n请输入课程编号:");
scanf("%d%*c", &C_LNum);
printf("\n查找中......\n\n");
printf("学号\t姓名\t课程名称\t课程成绩\t课程学分\n");
printf("----------------------------------------------------\n");
for (i = 0; i < Student_Count; i++)
{
for (j = 0; j < S[i].Lesson_Count; j++)
{
if (S[i].L[j].Lesson_Num == C_LNum)
{
printf("%d\t%s\t%s\t\t%d\t\t%d\n", S[i].Num, S[i].Name, S[i].L[j].Lesson_Name,
S[i].L[j].Lesson_Mark, S[i].L[j].Lesson_Credit);
printf("----------------------------------------------------\n");
SMark += S[i].L[j].Lesson_Mark;
SSNum ++;
if (S[i].L[j].Lesson_Mark >= 60) PassSNum++;
break;
}
}
}
printf("\n平均分:%.2lf\t及格率:%.2lf%%\n\n", SMark / SSNum, PassSNum / SSNum * 100);
printf("\n查找完毕...回车继续\n");
getchar();
}
void WriteFile()
{
FILE *fp;
int i, j;
char Adr[100];
printf("\n请输入写入的文件地址:\n\n地址输入格式:例如d:\\\\Student.txt(\\\\为转义字符):");
scanf("%s%*c", Adr);
printf("\n写入中......\n");
if (fp = fopen(Adr,"w")) //写入文件
{
fprintf(fp,"%d\n",Student_Count);
for (i = 0; i < Student_Count; i++)
{
fprintf(fp,"%d\t%s\t%d\n",S[i].Num, S[i].Name,S[i].Lesson_Count);
for (j = 0; j < S[i].Lesson_Count; j++)
{
fprintf(fp,"%d\t%s\t%d\t%d\n", S[i].L[j].Lesson_Num,
S[i].L[j].Lesson_Name,S[i].L[j].Lesson_Mark,
S[i].L[j].Lesson_Credit);
}
}
printf("\n写入完成...回车继续\n");
fclose(fp);
}
else
{
printf("\n写入失败...回车继续\n");
}
getchar();
}
void ReadFile()
{
FILE *fp;
int i, j;
char Adr[100];
printf("\n请输入读取(为防止读入错误,希望与写入文件内容格式一致)的文件地址:\n\n地址输入格式:例如d:\\\\Student.txt(\\\\为转义字符):");
scanf("%s%*c", Adr);
printf("\n读取中......\n");
if (fp = fopen(Adr,"r"))
{
fscanf(fp,"%d",&Student_Count);
for (i = 0; i < Student_Count; i++)
{
fscanf(fp,"%d%s%d",&S[i].Num, &S[i].Name,&S[i].Lesson_Count);
for (j = 0; j < S[i].Lesson_Count; j++)
{
fscanf(fp,"%d%s%d%d",&S[i].L[j].Lesson_Num,
&S[i].L[j].Lesson_Name,&S[i].L[j].Lesson_Mark,
&S[i].L[j].Lesson_Credit);
}
}
printf("\n读取成功...回车继续\n");
fclose(fp);
}
else
{
printf("\n读取失败...回车继续\n");
}
getchar();
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