In this paper, the example of C language version of the student performance management system to share the specific code, for your reference, the specific content is as follows
#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%-s\n"," The name "," The class "," Student id "," faculties "," Chinese language and literature "," mathematics "," English "," average "," Pass the ");
}
//---------------------------------------------------------Print(Student stu)
void Print(Student stu)
{
printf("%-8s%-12s%-12s%-8s%-7.2lf%-7.2lf%-7.2lf%-7.2lf%-s\n",stu.Name,stu.ClassNo,stu.No,stu.Dept,stu.Chinese,stu.Math,stu.English,stu.Ave,stu.Pass?" is ":" no ");
}
//---------------------------------------------------------PrintNo(char No[])
void PrintNo(char No[])
{
Student stu;
int n;
bool find=0;
FILE *fp=fopen(path,"ab+");// In order to ab+ Mode open prevent data An error occurred when the file did not exist
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(" Not found! ");
}
//---------------------------------------------------------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(" No data ");
else
printf(" A total of %d article \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(" No data ");
else
printf(" A total of %d article \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(" No data ");
else
printf(" A total of %d article \n",cnt);
}
//---------------------------------------------------------Input()
Student Input()
{
Student stu;
puts(" Please enter your name, class, student number and school :");
scanf("%s%s%s%s",&stu.Name,&stu.ClassNo,&stu.No,&stu.Dept);
puts(" Please enter your grades: Chinese, math, English ");
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(" School success ");
puts(" Continue typing? [1] is [0] no ");
scanf("%d",&cmd);
}while(cmd==1);
}
//---------------------------------------------------------Del()
void Del()
{
int cmd,cmd2;
char No[20];
do{
puts(" Please enter the student number to delete: ");
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(" Are you sure you want to delete it? [1] determine [0] cancel ");
scanf("%d",&cmd2);
if(cmd2==1)
puts(" deleted ");
else
fwrite(&stu,sizeof(stu),1,fp2);
}
else
fwrite(&stu,sizeof(stu),1,fp2);
}
fclose(fp);
fclose(fp2);
if(find==0)
{
printf(" Student id not found %s\n",No);
remove(tmp);
}
else
{
remove(path);
rename(tmp,path);
}
puts(" Continue to delete? [1] is [0] no ");
scanf("%d",&cmd);
}while(cmd==1);
}
//---------------------------------------------------------Change()
void Change()
{
int cmd;
char No[20];
do{
puts(" Please enter the student number to be changed: ");
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(" Change successful! ");
}
else
{
printf(" Student id not found %s\n",No);
remove(tmp);
}
puts(" Continue the change? [1] is [0] no ");
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(" Analysis of Chinese scores... ");
printf(" A total of %d students \n Good: %d people \n Pass: %d people \n Fail: %d people \n Pass: %.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n"," ranking "," The name "," Student id "," Chinese language and literature ");
for(int i=0;i<cnt;i++)
{
printf(" The first %2d The name %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Chinese);
}
printf(" Average score: %.2lf\n",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(" Math grade analysis... ");
printf(" A total of %d students \n Good: %d people \n Pass: %d people \n Fail: %d people \n Pass: %.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n"," ranking "," The name "," Student id "," mathematics ");
for(int i=0;i<cnt;i++)
{
printf(" The first %2d The name %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Math);
}
printf(" Average score: %.2lf\n",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(" Analysis of English scores... ");
printf(" A total of %d students \n Good: %d people \n Pass: %d people \n Fail: %d people \n Pass: %.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n"," ranking "," The name "," Student id "," English ");
for(int i=0;i<cnt;i++)
{
printf(" The first %2d The name %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].English);
}
printf(" Average score: %.2lf\n",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(" Gpa analysis... ");
printf("%-8s%-10s%-12s%-s\n"," ranking "," The name "," Student id "," The average scores ");
for(int i=0;i<cnt;i++)
{
printf(" The first %2d The name %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Ave);
}
printf(" Average score: %.2lf\n",sum/cnt/3);
}
//---------------------------------------------------------Search()
void Search()
{
int cmd,cmd2;
while(1)
{
system("cls");
puts("[1] Check by student number ");
puts("[2] Query by class ");
puts("[3] All output ");
puts("[4] Search by department ");
puts("[5] Course analysis ");
puts("[0] Return to main interface ");
scanf("%d",&cmd);
if(cmd==0)
break;
switch(cmd)
{
case 1:
{
char No[20];
puts(" Please enter the student number to be inquired: ");
scanf("%s",&No);
PrintNo(No);
}
break;
case 2:
{
char ClassNo[20];
puts(" Please enter to inquire the class number: ");
scanf("%s",&ClassNo);
PrintClass(ClassNo);
}
break;
case 3:
PrintAll();
break;
case 4:
{
char Dept[20];
puts(" Please enter the department to be inquired: ");
scanf("%s",&Dept);
PrintDept(Dept);
}
break;
case 5:
while(1)
{
puts("[1] Language score analysis ");
puts("[2] Mathematical performance analysis ");
puts("[3] Analysis of English scores ");
puts("[4] Average score analysis ");
puts("[0] On the back 1 level ");
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(" Illegal instruction! ");
}
}
break;
default:
puts(" Illegal instruction! ");
}
while(1)
{
puts("[0] return ");
puts("[1] entry ");
puts("[2] delete ");
puts("[3] Modify the ");
scanf("%d",&cmd2);
if(cmd2==0)
break;
switch(cmd2)
{
case 1:
Insert();
break;
case 2:
Del();
break;
case 3:
Change();
break;
default:
puts(" Illegal instruction! ");
}
}
}
}
//---------------------------------------------------------Menu()
void ShowMenu1()
{
int i;
puts("");
printf(" ");
for(i=0;i<14;i++)
putchar(c);
printf(" Performance management and analysis system ");
for(i=0;i<14;i++)
putchar(c);
puts("");
printf(" %c %c\n",c,c);
printf(" %c Please enter the instruction %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [0] exit %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [1] entry %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [2] delete %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [3] The query %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [4] To change the %c\n",c,c);
printf(" %c %c\n",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(" Performance management and analysis system ");
for(i=0;i<14;i++)
putchar(c);
puts("");
printf(" %c %c\n",c,c);
printf(" %c Please enter the instruction %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [0] exit %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [1] entry %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [2] delete %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [3] The query %c\n",c,c);
printf(" %c %c\n",c,c);
printf(" %c [4] To change the %c\n",c,c);
printf(" %c %c\n",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("[ ]\b\b");
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(" Illegal orders! ");
}
}
return 0;
}