C Language roll Management system, 1 copy for your reference, the specific content is as follows
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#define N 100
void mycreat();
void mynewcreat();
void mydisplay();
void myretake();
void myselect();
void mynumsort();
void mysort();
void myprint1();
void myprint2();
void myprint3();
void myfenduan();
struct student
{
char name[10];
int grade[5];
double ave;
char num[10];
};
void myprint1()
{
char choose='\0',yes_no='\0';
do
{
system("cls");
printf (" |---------------------------|\n");
printf (" | Please enter the option number (0-4) |\n");
printf (" |---------------------------|\n");
printf (" | 1---------- School grades |\n");
printf (" | 2---------- Statistical results |\n");
printf (" | 3---------- Dealing with one's status as a student |\n");
printf (" | 4---------- Display the data |\n");
printf (" | 0---------- Log out |\n");
printf (" |---------------------------|\n");
printf(" ");
choose=getche();
switch(choose)
{ case '1':mycreat(); break;
case '2':myprint2(); break;
case '3':myprint3(); break;
case '4':mydisplay(); break;
case '0':break;
default :printf("\n %c Illegal option! \n",choose);
}
if(choose=='0')
{
printf("\n");
printf(" Thank you for your use! \n");
break;
}
printf("\n Should I continue to choose (Y/N) ? \n");
do
{ yes_no=getch( );
} while(yes_no!='Y' && yes_no!='y'&& yes_no!='N' && yes_no!='n');
} while(yes_no=='Y' || yes_no=='y');
}
void myprint2()
{
char choose='\0',yes_no='\0';
do
{
system("cls");
printf (" |-----------------------------------|\n");
printf (" | Please enter the option number (0-4) |\n");
printf (" |-----------------------------------|\n");
printf (" | 1---------- Sort by student number |\n");
printf (" | 2---------- Calculate the average score and sort it |\n");
printf (" | 3---------- Statistical fraction segment |\n");
printf (" | 4---------- return |\n");
printf (" | 0---------- Log out |\n");
printf (" |-----------------------------------|\n");
printf(" ");
choose=getche();
switch(choose)
{ case '1':mynumsort(); break;
case '2':mysort(); break;
case '3':myfenduan(); break;
case '4':myprint1(); break;
case '0':break;
default :printf("\n %c Illegal option! \n",choose);
}
if(choose=='0')
{
printf("\n");
printf(" Thank you for your use! \n");
break;
}
printf("\n Should I continue to choose (Y/N) ? \n");
do
{ yes_no=getch( );
} while(yes_no!='Y' && yes_no!='y'&& yes_no!='N' && yes_no!='n');
} while(yes_no=='Y' || yes_no=='y');
}
void myprint3()
{
char choose='\0',yes_no='\0';
do
{
system("cls");
printf (" |---------------------------------------|\n");
printf (" | Please enter the option number (0-4) |\n");
printf (" |---------------------------------------|\n");
printf (" | 1---------- Generate and print the make-up exam notice |\n");
printf (" | 2---------- Generate and print the drop-out notice |\n");
printf (" | 3---------- Generate and print the new roster |\n");
printf (" | 4---------- return |\n");
printf (" | 0---------- Log out |\n");
printf (" |---------------------------------------|\n");
printf(" ");
choose=getche();
switch(choose)
{ case '1':myretake(); break;
case '2':myselect(); break;
case '3':mynewcreat(); break;
case '4':myprint1(); break;
case '0':break;
default :printf("\n %c Illegal option! \n",choose);
}
if(choose=='0')
{
printf("\n");
printf(" Thank you for your use! \n");
break;
}
printf("\n Should I continue to choose (Y/N) ? \n");
do
{ yes_no=getch( );
} while(yes_no!='Y' && yes_no!='y'&& yes_no!='N' && yes_no!='n');
} while(yes_no=='Y' || yes_no=='y');
}
void mycreat()
{
int i=1,j=0;
struct student temp={0};
FILE*fp=NULL;
fp=fopen("d:\\yuan.dat","w");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
system("cls");
printf(" Note: Please keep all the digits when entering your student id 1 To be out of position 0 A filling. For example, the maximum student number is 1000 Are all keep 4 A significant digit. ");
printf("\n Please enter the first 1 A record: \n");
printf(" Student id ( with # The end of the input ):");
do
{
gets(temp.num);
}while(strcmp(temp.num,"")==0);
printf(" The name ( with # The end of the input ):");
gets(temp.name);
printf(" Please enter the The high number of English physical programming philosophy 5 Set of results ( with # The end of the input ): ");
for(j=0;j<=4;j++)
{
scanf("%d",&temp.grade[j]);
}
while(temp.num[0]!='#'&&temp.name[0]!='#'&&temp.grade[0]!='#')
{
fprintf(fp,"%23s%15s",temp.num,temp.name);
for(j=0;j<=4;j++)
{
fprintf(fp,"%5d",temp.grade[j]);
}
fprintf(fp,"\n");
i++;
printf("\n Please enter the first %d A record :\n",i);
printf(" Student id ( with # The end of the input ):");
do
{
gets(temp.num);
}while(strcmp(temp.num,"")==0);
printf(" The name ( with # The end of the input ):");
gets(temp.name);
printf(" Please enter the The high number of English physical programming philosophy 5 Set of results ( with # The end of the input ): ");
for(j=0;j<=4;j++)
{
scanf("%8d",&temp.grade[j]);
}
}
fclose(fp);
}
void mynumsort()
{
int i=0,j=0,k=0,n=0,grade=0,num=0,m=0,ww;
struct student temp[N]={0};
struct student a;
FILE *fp=NULL;
FILE *fq=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf("\n Failed to open file !\n");
return;
}
system("cls");
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
printf("n=%d",n);
fclose(fp);
printf("\n");
for(i=0; i<n; i++)
{ k=i;
for(j=k+1; j<n; j++)
if(strcmp(temp[k].num,temp[j].num)>0)
k=j;
a=temp[i];
temp[i]=temp[k];
temp[k]=a;
}
for(k=0;k<n;k++)
{
printf("%10s No. %10s classmate ",temp[k].num,temp[k].name);
for(m=0;m<5;m++)
{
printf("%5d points ",temp[k].grade[m]);
}
printf("\n");
}
if(n==0)printf("\n There is no record in the file! \n");
else printf("\n In the file %d A record ",n);
fq=fopen("d:\\std.dat","w");
if(fq==NULL)
{
printf(" Failed to open file! \n");
exit(0);
}
for(i=0;i<n;i++)
{
fprintf(fq,"%23s%15s",temp[i].num,temp[i].name);
for(j=0;j<5;j++)
{
fprintf(fq,"%2d",temp[i].grade[j]);
}
fprintf(fq,"\n");
}
fclose(fq);
printf(" Calculation completed Stored in the d:\std.dat Among the documents, please check ");
}
void mysort()
{
struct student temp[N]={0},a[N]={0};
int i=0,j=0,n=0,ww=0;
FILE*fp=NULL;
FILE*fq=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
exit(0);
}
system("cls");
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
for(i=0;i<n;i++)
{
for(j=0;j<5;j++)
{
temp[i].ave=temp[i].ave+temp[i].grade[j];
}
temp[i].ave=temp[i].ave/5;
}
for(i=0;i<n;i++)
{
if(temp[i].ave<temp[i+1].ave)
{
a[i]=temp[i];
temp[i]=temp[i+1];
temp[i+1]=a[i];
}
}
fq=fopen("d:\\sort.dat","w");
if(fq==NULL)
{
printf(" Failed to open file! \n");
exit(0);
}
for(i=0;i<n;i++)
{
fprintf(fq,"%23s%15s%10.2f",temp[i].num,temp[i].name,temp[i].ave );
for(j=0;j<5;j++)
{
fprintf(fq,"%2d",temp[i].grade[j]);
}
fprintf(fq,"\n");
}
fclose(fq);
printf(" Calculation completed Stored in the d:\sort.dat Among the documents, please check ");
}
void myfenduan()
{
int i=0,j=0,n=0,ww;
int b[N]={0},c[N]={0},d[N]={0},e[N]={0},f[N]={0};
struct student temp[N]={0};
FILE*fp=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
system("cls");
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
for(i=0;i<n;i++)
{
for(j=0;j<5;j++)
{
if(temp[i].grade[j]>=90)
b[j]=b[j]+1;
else if(temp[i].grade[j]>=80)
c[j]=c[j]+1;
else if(temp[i].grade[j]>=70)
d[j]=d[j]+1;
else if(temp[i].grade[j]>=60)
e[j]=e[j]+1;
else f[j]=f[j]+1;
}
}
printf(" The number of students in each course and section \n");
printf("________________________________________________________\n");
printf(" |90 Points above | 80~89 points | 70~79 points | 60~69 points | 60 The following \n");
printf("--------------------------------------------------------\n");
printf(" The high number of _____%d________%d_________%d________%d_________%d___\n",b[0],c[0],d[0],e[0],f[0]);
printf("__________________________________________________\n");
printf(" English _____%d________%d_________%d________%d_________%d___\n",b[1],c[1],d[1],e[1],f[1]);
printf("__________________________________________________\n");
printf(" physical _____%d________%d_________%d________%d_________%d___\n",b[2],c[2],d[2],e[2],f[2]);
printf("__________________________________________________\n");
printf(" programming _____%d________%d_________%d________%d_________%d___\n",b[3],c[3],d[3],e[3],f[3]);
printf("__________________________________________________\n");
printf(" philosophy _____%d________%d_________%d________%d_________%d___\n",b[4],c[4],d[4],e[4],f[4]);
printf("__________________________________________________\n");
fclose(fp);
}
void mydisplay()
{ int n=0,j=0,k=0,m=0,ww;
struct student temp[N]={0};
FILE*fp=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
system("cls");
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
for(k=0;k<n;k++)
{
printf("%23s %15s ",temp[k].num,temp[k].name);
for(m=0;m<5;m++)
{
printf("%d ",temp[k].grade[m]);
}
printf("\n");
}
if(n==0)printf("\n There is no record in the file! \n");
else printf("\n The files are all together %d A record! ",n);
fclose(fp);
}
void myretake()
{
int i=0,e=0,j=0,n=0,s[5]={0},ww;
struct student temp[N]={0};
FILE*fp=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
for (i=0;i<n;i++)
{
for(j=0;j<5;j++)
{
if(temp[i].grade[j]<60)
s[i]++;
}
if(s[i]>=1 && s[i]<=3)
{ printf("\n");
printf(" Student id %10s The name %10s \n",temp[i].num,temp[i].name);
if(temp[i].grade[0]<60)
printf("%10s Your advanced degree is %6d A make-up examination is required , please 2011 years 2 month 26 The morning of 9 Point at the teaching building 5023 The classroom has a make-up examination \n",temp[i].name,temp[i].grade[0]);
if(temp[i].grade[1]<60)
printf("%10s Your score in English is %6d A make-up examination is required , please 2011 years 2 month 27 The morning of 9 Point at the teaching building 5023 The classroom has a make-up examination \n",temp[i].name,temp[i].grade[1]);
if(temp[i].grade[2]<60)
printf("%10s Your physics score is %6d A make-up examination is required , please 2011 years 2 month 28 The morning of 9 Point at the teaching building 5023 The classroom has a make-up examination \n",temp[i].name,temp[i].grade[2]);
if(temp[i].grade[3]<60)
printf("%10s Your programming score is %6d A make-up examination is required , please 2011 years 2 month 26 On the afternoon 3 Point at the teaching building 5023 The classroom has a make-up examination \n",temp[i].name,temp[i].grade[3]);
if(temp[i].grade[4]<60)
printf("%10s Your marks for Mazur are %6d A make-up examination is required , please 2011 years 2 month 28 On the afternoon 3 Point at the teaching building 5023 The classroom has a make-up examination \n",temp[i].name,temp[i].grade[4]);
}
}
for(e=0;e<n;e++)
{
if(s[e]!=0)
{
printf("\n");
printf(" The above students need make-up examination! ");
}
else
{
printf("\n");
printf(" No students need make-up exams! ");
}
break;
}
}
void myselect()
{
int i=0,k=0,s[5]={0},n=0,j=0,ww;
struct student temp[N]={0};
FILE*fp=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
for(j=0;j<5;j++)
{
ww=fscanf(fp,"%d",&temp[n].grade[j]);
if(ww==-1) break;
}
n++;
}
for(i=0;i<n-1;i++)
{
for(k=0;k<5;k++)
{
if (temp[i].grade[k]<60)
s[i]=s[i]+1;
}
if(s[i]>3)
{
printf("\n");
printf(" Student id %10s The name %10s Because you failed the subject for %d The door (more than 3 ), so I quit school. \n",temp[i].num,temp[i].name,s[i]);
if (temp[i].grade[0]<60)
printf("%15s Your advanced degree is %6d To fail. \n",temp[i].name,temp[i].grade[0]);
if (temp[i].grade[1]<60)
printf("%15s Your score in English is %6d To fail. \n",temp[i].name,temp[i].grade[1]);
if (temp[i].grade[2]<60)
printf("%15s Your physics score is %6d To fail. \n",temp[i].name,temp[i].grade[2]);
if (temp[i].grade[3]<60)
printf("%15s Your programming score is %6d To fail. \n",temp[i].name,temp[i].grade[3]);
if (temp[i].grade[4]<60)
printf("%15s Your marks for Mazur are %6d To fail. \n",temp[i].name,temp[i].grade[4]);
}
}
}
void mynewcreat()
{
int i=0,k=0,s[5]={0},z[5]={0},v=0,n=0,m=0,j=0,p=0,c=0,ww;
struct student temp[N]={0};
FILE*fp=NULL;
FILE*fq=NULL;
fp=fopen("d:\\yuan.dat","r");
if(fp==NULL)
{
printf(" Failed to open file! \n");
return;
}
while(feof(fp)==0)
{
ww=fscanf(fp,"%23s%15s",temp[n].num,temp[n].name);
if(ww==-1) break;
for(j=0;j<5;j++)
{
fscanf(fp,"%d",&temp[n].grade[j]);
}
n++;
}
while(i<=n)
{
for(k=0;k<5;k++)
{
if (temp[i].grade[k]<60)
s[i]=s[i]+1;
}
for(v=0;v<5;v++)
{
if(temp[i].grade[v]==0)
z[i]++;
}
if(z[i]==5)
{
break;
}
if(s[i]<=3)
{
i++;
}
if(s[i]>3)
{
for(c=i;c<=n;c++)
{
temp[c]=temp[c+1];
}
s[i]=0;
}
}
printf("\n");
printf(" After the removal of a dropped out student, the student roster is: ");
printf("\n");
for(p=0;p<n-1;p++)
{
printf("\n");
printf("%10s No. %10s points ",temp[p].num,temp[p].name);
for(m=0;m<5;m++)
{
printf("%d ",temp[p].grade[m]);
}
printf("\n");
}
fq=fopen("d:\\next.dat","w");
if(fq==NULL)
{
printf(" Failed to open file! \n");
exit(0);
}
for(i=0;i<n;i++)
{
fprintf(fq,"%23s%15s",temp[i].num,temp[i].name);
for(j=0;j<5;j++)
{
fprintf(fq,"%2d",temp[i].grade[j]);
}
fprintf(fq,"\n");
}
fclose(fq);
printf(" Calculation completed Stored in the d:\next.dat Among the documents, please check ");
}
main()
{
myprint1();
}If you have time to sort out what you have learned, review the old and learn the new.
For more information, please pay attention to the topic management System Development.