#include<stdio.h> #include<stdlib.h> #include<time.h> #include<conio.h> #include<string.h> #include<algorithm> char buf[255];
char c=14;
char path[]="D:\data";
char tmp[]="D:\tmp";
struct Student {
char Name[20];
char No[20];
char Dept[20];
char ClassNo[20];
double Math,Chinese,English;
double Ave;
bool Pass;
}
students[500];
bool cmp1(Student s1,Student s2) {
return s1.Chinese>s2.Chinese;
}
bool cmp2(Student s1,Student s2) {
return s1.Math>s2.Math;
}
bool cmp3(Student s1,Student s2) {
return s1.English>s2.English;
}
bool cmp4(Student s1,Student s2) {
return s1.Ave>s2.Ave;
}
//---------------------------------------------------------void Sort(int cmd) /* 1 ChineseSort 2 MathSort 3 EnglishSort 4 AveSort */ int Sort(int cmd) {
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0)) {
students[cnt++]=stu;
}
fclose(fp);
switch(cmd) {
case 1: std::sort(students,students+cnt,cmp1);
break;
case 2: std::sort(students,students+cnt,cmp2);
break;
case 3: std::sort(students,students+cnt,cmp3);
break;
case 4: std::sort(students,students+cnt,cmp4);
break;
default: exit(0);
}
return cnt;
}
//---------------------------------------------------------PrintTitle() void PrintTitle() {
printf("%-8s%-12s%-12s%-8s%-7s%-7s%-7s%-7s%-sn","姓名","班级","学号","系院","语文","数学","英语","平均分","及格");
}
//---------------------------------------------------------Print(Student stu) void Print(Student stu) {
printf("%-8s%-12s%-12s%-8s%-7.2lf%-7.2lf%-7.2lf%-7.2lf%-sn",stu.Name,stu.ClassNo,stu.No,stu.Dept,stu.Chinese,stu.Math,stu.English,stu.Ave,stu.Pass?"是":"否");
}
//---------------------------------------------------------PrintNo(char No[]) void PrintNo(char No[]) {
Student stu;
int n;
bool find=0;
FILE *fp=fopen(path,"ab+");
//以ab+方式打开防止data文件不存在时发生错误 while((n=fread(&stu,sizeof(stu),1,fp))>0) {
if(!strcmp(stu.No,No)) {
find=1;
break;
}
}
fclose(fp);
if(find) {
PrintTitle();
Print(stu);
}
else puts("未找到！");
}
//---------------------------------------------------------PrintClass(char ClassNo[]) void PrintClass(char ClassNo[]) {
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0)) {
if(!strcmp(stu.ClassNo,ClassNo)) {
if(cnt==0) PrintTitle();
Print(stu);
cnt++;
}
}
fclose(fp);
if(cnt==0) puts("无数据");
else printf("共%d条n",cnt);
}
//---------------------------------------------------------PrintDept(char Dept[]) void PrintDept(char Dept[]) {
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0)) {
if(!strcmp(stu.Dept,Dept)) {
if(cnt==0) PrintTitle();
Print(stu);
cnt++;
}
}
fclose(fp);
if(cnt==0) puts("无数据");
else printf("共%d条n",cnt);
}
//---------------------------------------------------------PrintAll() void PrintAll() {
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0)) {
if(cnt==0) PrintTitle();
Print(stu);
cnt++;
}
fclose(fp);
if(cnt==0) puts("无数据");
else printf("共%d条n",cnt);
}
//---------------------------------------------------------Input() Student Input() {
Student stu;
puts("请输入姓名、班级、学号、系院:");
scanf("%s%s%s%s",&stu.Name,&stu.ClassNo,&stu.No,&stu.Dept);
puts("请输入各科成绩：语文、数学、英语");
scanf("%lf%lf%lf",&stu.Chinese,&stu.Math,&stu.English);
stu.Ave=(stu.Chinese+stu.Math+stu.English)/3;
if(stu.Chinese>=60&&stu.Math>=60&&stu.English>=60) stu.Pass=1;
else stu.Pass=0;
return stu;
}
//---------------------------------------------------------Insert() void Insert() {
int cmd;
do{
Student stu=Input();
FILE *fp=fopen(path,"ab+");
fwrite(&stu,sizeof(stu),1,fp);
fclose(fp);
puts("录入成功");
puts("继续录入吗？[1]是[0]否");
scanf("%d",&cmd);
}
while(cmd==1);
}
//---------------------------------------------------------Del() void Del() {
int cmd,cmd2;
char No[20];
do{
puts("请输入要删除的学号：");
scanf("%s",&No);
Student stu;
FILE *fp=fopen(path,"ab+");
FILE *fp2=fopen(tmp,"wb");
int n,find=0;
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
if(!strcmp(stu.No,No)) {
find=1;
Print(stu);
puts("确定要删除吗？[1]确定[0]取消");
scanf("%d",&cmd2);
if(cmd2==1) puts("已删除");
else fwrite(&stu,sizeof(stu),1,fp2);
}
else fwrite(&stu,sizeof(stu),1,fp2);
}
fclose(fp);
fclose(fp2);
if(find==0) {
printf("未找到学号%sn",No);
remove(tmp);
}
else {
remove(path);
rename(tmp,path);
}
puts("继续删除吗？[1]是[0]否");
scanf("%d",&cmd);
}
while(cmd==1);
}
//---------------------------------------------------------Change() void Change() {
int cmd;
char No[20];
do{
puts("请输入要更改的学号：");
scanf("%s",&No);
Student stu;
int find=0;
FILE *fp=fopen(path,"ab+");
FILE *fp2=fopen(tmp,"wb");
int n;
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
if(!strcmp(stu.No,No)) {
find=1;
stu=Input();
fwrite(&stu,sizeof(stu),1,fp2);
}
else fwrite(&stu,sizeof(stu),1,fp2);
}
fclose(fp);
fclose(fp2);
if(find) {
remove(path);
rename(tmp,path);
puts("更改成功！");
}
else {
printf("未找到学号%sn",No);
remove(tmp);
}
puts("继续更改吗？[1]是[0]否");
scanf("%d",&cmd);
}
while(cmd==1);
}
//---------------------------------------------------------AboutCourse void Chinese() {
double sum=0,ave;
int pass=0,fail=0,better=0;
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=Sort(1);
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
sum+=stu.Chinese;
if(stu.Chinese>=60) {
pass++;
if(stu.Chinese>=80) better++;
}
else fail++;
}
ave=sum/cnt;
puts("语文成绩分析……");
printf("共有%d学生n优秀：%d人n及格：%d人n不及格：%d人n及格率：%.2lf%%n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-sn","名次","姓名","学号","语文");
for(int i=0;
i<cnt;
i++) {
printf("第%2d名 %-10s%-12s%-8.2lfn",i+1,students[i].Name,students[i].No,students[i].Chinese);
}
printf("平均分：%.2lfn",ave);
}
void Math() {
double sum=0,ave;
int pass=0,fail=0,better=0;
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=Sort(2);
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
sum+=stu.Math;
if(stu.Math>=60) {
pass++;
if(stu.Math>=80) better++;
}
else fail++;
}
ave=sum/cnt;
puts("数学成绩分析……");
printf("共有%d学生n优秀：%d人n及格：%d人n不及格：%d人n及格率：%.2lf%%n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-sn","名次","姓名","学号","数学");
for(int i=0;
i<cnt;
i++) {
printf("第%2d名 %-10s%-12s%-8.2lfn",i+1,students[i].Name,students[i].No,students[i].Math);
}
printf("平均分：%.2lfn",ave);
}
void English() {
double sum=0,ave;
int pass=0,fail=0,better=0;
Student stu;
FILE *fp=fopen(path,"ab+");
int n,cnt=Sort(3);
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
sum+=stu.English;
if(stu.English>=60) {
pass++;
if(stu.English>=80) better++;
}
else fail++;
}
ave=sum/cnt;
puts("英语成绩分析……");
printf("共有%d学生n优秀：%d人n及格：%d人n不及格：%d人n及格率：%.2lf%%n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-sn","名次","姓名","学号","英语");
for(int i=0;
i<cnt;
i++) {
printf("第%2d名 %-10s%-12s%-8.2lfn",i+1,students[i].Name,students[i].No,students[i].English);
}
printf("平均分：%.2lfn",ave);
}
void Average() {
Student stu;
int n,cnt=Sort(4);
double sum=0;
FILE *fp=fopen(path,"ab+");
while((n=fread(&stu,sizeof(stu),1,fp))>0) {
sum+=stu.Chinese;
sum+=stu.Math;
sum+=stu.English;
}
puts("平均成绩分析……");
printf("%-8s%-10s%-12s%-sn","名次","姓名","学号","平均成绩");
for(int i=0;
i<cnt;
i++) {
printf("第%2d名 %-10s%-12s%-8.2lfn",i+1,students[i].Name,students[i].No,students[i].Ave);
}
printf("平均分：%.2lfn",sum/cnt/3);
}
//---------------------------------------------------------Search() void Search() {
int cmd,cmd2;
while(1) {
system("cls");
puts("[1] 按学号查询");
puts("[2] 按班级查询");
puts("[3] 输出全部");
puts("[4] 按系别查询");
puts("[5] 课程分析");
puts("[0] 返回主界面");
scanf("%d",&cmd);
if(cmd==0) break;
switch(cmd) {
case 1: {
char No[20];
puts("请输入要查询的学号：");
scanf("%s",&No);
PrintNo(No);
}
break;
case 2: {
char ClassNo[20];
puts("请输入要查询班级号：");
scanf("%s",&ClassNo);
PrintClass(ClassNo);
}
break;
case 3: PrintAll();
break;
case 4: {
char Dept[20];
puts("请输入要查询的系别：");
scanf("%s",&Dept);
PrintDept(Dept);
}
break;
case 5: while(1) {
puts("[1] 语文成绩分析");
puts("[2] 数学成绩分析");
puts("[3] 英语成绩分析");
puts("[4] 平均成绩分析");
puts("[0] 返回上一级");
scanf("%d",&cmd2);
if(cmd2==0) break;
switch(cmd2) {
case 1: Chinese();
break;
case 2: Math();
break;
case 3: English();
break;
case 4: Average();
break;
default: puts("不合法指令！");
}
}
break;
default: puts("不合法指令！");
}
while(1) {
puts("[0] 返回");
puts("[1] 录入");
puts("[2] 删除");
puts("[3] 修改");
scanf("%d",&cmd2);
if(cmd2==0) break;
switch(cmd2) {
case 1: Insert();
break;
case 2: Del();
break;
case 3: Change();
break;
default: puts("不合法指令！");
}
}
}
}
//---------------------------------------------------------Menu() void ShowMenu1() {
int i;
puts("");
printf(" ");
for(i=0;
i<14;
i++) putchar(c);
printf("成绩管理分析系统");
for(i=0;
i<14;
i++) putchar(c);
puts("");
printf(" %c %cn",c,c);
printf(" %c 请输入指令 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [0] 退出 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [1] 录入 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [2] 删除 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [3] 查询 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [4] 更改 %cn",c,c);
printf(" %c %cn",c,c);
printf(" ");
for(i=0;
i<44;
i++) putchar(c);
puts("");
}
void ShowMenu2() {
int i;
puts("");
printf(" ");
for(i=0;
i<14;
i++) putchar(c);
printf("成绩管理分析系统");
for(i=0;
i<14;
i++) putchar(c);
puts("");
printf(" %c %cn",c,c);
printf(" %c 请输入指令 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [0] 退出 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [1] 录入 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [2] 删除 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [3] 查询 %cn",c,c);
printf(" %c %cn",c,c);
printf(" %c [4] 更改 %cn",c,c);
printf(" %c %cn",c,c);
printf(" ");
for(i=0;
i<44;
i++) putchar(c);
puts("");
}
//---------------------------------------------------------void RandColor() void RandColor() {
int a,b;
char param[20]="color ",param2[10];
do{
a=rand()%16;
b=rand()%16;
}
while(a==b);
sprintf(param2,"%x%x",a,b);
strcat(param,param2);
system(param);
}
//---------------------------------------------------------main() int main() {
int cmd;
srand(time(NULL));
for(int i=0;
i<8;
i++) {
RandColor();
system("cls");
ShowMenu1();
system("cls");
ShowMenu2();
}
system("color 0a");
while(1) {
system("cls");
ShowMenu1();
printf("[ ]bb");
scanf("%d",&cmd);
if(cmd==0) break;
switch(cmd) {
case 1: Insert();
break;
case 2: Del();
break;
case 3: Search();
break;
case 4: Change();
break;
default: puts("命令不合法！");
}
}
return 0;
}