C language student status management system has been working for a long time, but there are some small problems in it. I hope you can find and help to change it. Please note that if you input the password for 3 times, the user will be automatically logged out
Code:
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<conio.h>
struct student
{
char xuehao[100];// Enter the student id
char name[100];// Enter the name
char sex[100];// Enter the gender
int age;// Enter the age
char jiguan[100];// Enter the native
char dianhua[100];// Enter the phone
char yuanxi[100];// Enter college
char banji[100];// Enter the class
} stu[1000];
void shouye()// Home page
{
int i;
printf("^-^-----------------------------------------------------^-^\n");
printf("\n");
printf(" $ Welcome to use the Student status management system ! $\n");
printf(" $ The producer : $\n");
printf(" $ Li Weipeng $\n");
printf(" $ Time: 2017.12 $\n");
printf("\n");
printf("^-^-----------------------------------------------------^-^\n");
printf("Enter Key to continue! ");
getchar();
system("cls");
}
void zhuxiao()// The cancellation of the user
{
system("shutdown -f ");
}
void denglu()// landing
{
void menu();
int i,j;
char mima[16];
for(j=1; j<=4;)
{
if(j==4)
break;
else if(j<4)
{
printf(" Please enter the 6 A password: \n");
printf(" Remaining input times %d\n",4-j);
for(i=0; i<6; i++)
{
mima[i]=getch();
printf("*");
}
}
mima[i]='\0';
if(strcmp(mima,"123456")==0)
{
system("cls");
printf(" Password is correct \n");
printf(" Login successful! \n");
printf(" According to the Enter Key to continue !");
getchar();
menu();
return;
}
else
{
system("cls");
printf(" Password mistake \n");
j++;
}
}
printf(" Log out!! \n");
zhuxiao();
getch();
}
void menu()// The menu
{
system("cls");
printf("*----------------------------- Student management system --------------------------------*\n");
printf("\n");
printf("1. Add student information 2. Delete a student information 3. Browse student information \n");
printf("4. Modify student information 5. Find information about a student 6. Quantity of display information \n");
printf("0. Log out \n");
printf("\n");
printf("*-------------------------------------------------------------------------*\n");
}
void save(int m)
{
int i;
FILE*fp;
if ((fp=fopen(" system ","wb"))==NULL)
{
printf (" File opening failed \n");
exit(0);
}
for (i=0; i<m; i++)
if (fwrite(&stu[i],sizeof(struct student),1,fp)!=1)
printf(" File opening failed \n");
fclose(fp);
}
int load()// Open the file , Read the data inside
{
FILEFILE *fp;
int i=0;
if((fp=fopen(" system ","rb"))==NULL)
{
printf (" File opening failed \n");
exit(0);
}
else
{
do
{
fread(&stu[i],sizeof(struct student),1,fp);
i++;
}
while(feof(fp)==0);
}
fclose(fp);
return(i-1);
}
int menuchoose()// Select menu
{
int n;
menu();
printf(" Please select the menu 0~6:");
while(1 != scanf("%d", &n) || n < 0 || n> 6)
{
menu();
printf(" Select menu error, please select again (0 ~ 6):");
fflush(stdin);// Clear input buffer
}
return n;
}
void add()// Add student information
{
int i,m,q,s=1;
system("cls");
printf("--------------- Enter student information ---------------\n");
printf(" Please enter the total number of students you want to add :\n");
scanf("%d",&m);
for (i=0; i<m; i++)
{
printf("\n Enter the first %d Student status information for each student .\n",i+1);
printf(" Please enter your student number: ");
scanf("%s",stu[i].xuehao);
for(q=0; q<m; q++)
{
if(strcmp(stu[q].xuehao,stu[i].xuehao)==0&&q!=i)
{
printf(" The student number already exists, please re-enter: \n");
printf(" Please enter your student number: \n");
s=1;
scanf("%s",stu[q].xuehao);
}
}
printf(" Please enter your name: ");
scanf("%s",stu[i].name);
printf(" Please enter gender: ");
scanf("%s",stu[i].sex);
printf(" Please enter your age: ");
scanf("%d",&stu[i].age);
getchar();
printf(" Native place: ");
scanf("%s",stu[i].jiguan);
printf(" Please enter the telephone number: ");
scanf("%s",stu[i].dianhua);
printf(" Please enter department: ");
scanf("%s",stu[i].yuanxi);
printf(" Please enter class: ");
scanf("%s",stu[i].banji);
}
save(m);
}
void show()
{
system("cls");
int i;
int m=load();
if(m==0)
{
printf("\n No student information! \n");
printf(" Do you add student information? \n Is this: 1 No: 2\n");
int a2;
scanf("%d",&a2);
if(a2==1)
add();
else
menu();
}
else
{
printf("---------------------- Browse student information --------------------------\n");
printf("\n");
printf("\t\t\t\t\t\t\t\n");
for(i=0; i<m; i++)
{
printf(" The first %d The information of one student is: \n",i+1);
printf(" Student id :%s\n",stu[i].xuehao);
printf(" The name :%s\n",stu[i].name);
printf(" gender :%s\n",stu[i].sex);
printf(" age :%d\n",stu[i].age);
printf(" Native place :%s\n",stu[i].jiguan);
printf(" The phone :%s\n",stu[i].dianhua);
printf(" departments :%s\n",stu[i].yuanxi);
printf(" The class :%s\n",stu[i].banji);
}
system("pause");
}
}
void del()
{
int m=load();
int i,j,n,t,flag;
char xuehao[20];
printf("\n The original student information is :\n");
show();
printf("\n");
printf(" Please enter the student number you want to delete :\n");
scanf("%s",xuehao);
for(flag=1,i=0; flag&&i<m; i++)
{
if(strcmp(stu[i].xuehao,xuehao)==0)
{
printf(" Student id :%s\n",stu[i].xuehao);
printf(" The name :%s\n",stu[i].name);
printf(" gender :%s\n",stu[i].sex);
printf(" age :%d\n",stu[i].age);
printf(" Native place :%s\n",stu[i].jiguan);
printf(" The phone :%s\n",stu[i].dianhua);
printf(" departments :%s\n",stu[i].yuanxi);
printf(" The class :%s\n",stu[i].banji);
printf(" Whether to delete this person's information ?\n Is the press 1, No please click 0:\n");
scanf("%d",&n);
if(n==1)
{
for(j=i; j<m-1; j++)
{
strcpy(stu[j].name,stu[j+1].name);
strcpy(stu[j].xuehao,stu[j+1].xuehao);
strcpy(stu[j].sex,stu[j+1].sex);
stu[j].age=stu[j+1].age;
strcpy(stu[j].yuanxi,stu[j+1].yuanxi);
strcpy(stu[j].banji,stu[j+1].banji);
strcpy(stu[j].jiguan,stu[j+1].jiguan);
strcpy(stu[j].dianhua,stu[j+1].dianhua);
}
flag=0;
}
}
}
if(!flag)
m=m-1;
else
printf("\n No information about this person !\n");
save(m);
printf("\n Whether to continue deleting information \n To continue please click 1\n Exit please click 0\n");
scanf("%d",&t);
switch(t)
{
case 1:
del();
break;
case 0:
menu();
break;
default :
break;
}
}
void xiugai()// Modify student information
{
system("cls");
FILEFILE *fp;
int n,i,j,c,x,y;
char m[10];
n=load();
show();
printf(" Please enter the student id or name you want to modify :");
scanf("%s",&m);
do
{
printf("\n Select the option you want to modify: \n\n1. Student id 2. The name 3. gender 4. age 5. Native place 6. The phone 7. departments 8. The class 9. Cancel and return \n");
printf(" Please select a ?:\n ");
scanf("%d",&c);
if(c>9||c<1)
{
menu();
puts("\n The wrong choice ! Please reselect !");
fflush(stdin);// Clear input buffer
}
}
while(c>9||c<1);
for (i=0; i<n; i++)
if (!strcmp(stu[i].xuehao,m)||!strcmp(stu[i].name,m))
{
switch (c)
{
case 1:
printf(" Student id :");
scanf("%s",stu[i].xuehao);
break;
case 2:
printf(" The name :");
scanf("%s",stu[i].name);
break;
case 3:
printf(" gender :");
scanf("%s",stu[i].sex);
break;
case 4:
printf(" age :");
scanf("%d",&stu[i].age);
break;
case 5:
printf(" Native place :");
scanf("%s",stu[i].jiguan);
break;
case 6:
printf(" The phone :");
scanf("%s",stu[i].dianhua);
break;
case 7:
printf(" departments :");
scanf("%s",stu[i].yuanxi);
break;
case 8:
printf(" The class :");
scanf("%s",stu[i].banji);
break;
case 9:
menu();/* Back to the main menu */
}
printf(" Do you want to save? \n");
printf(" Is this: 1\n No: 2\n");
scanf("%d",&x);
}
if(x==1)
{
save(n);
printf(" Save success !\n");
printf(" Do you want to continue the modification? Continue to: 1 No: 2\n");
int p;
scanf("%d",&p);
if(p==1)
{
xiugai();
}
else
{
menu();
}
}
else
{
printf(" Exit please click 0 , please press to continue the modification 1\n");
scanf("%d",&y);
switch(y)
{
case 0:
break;
case 1:
xiugai();
break;
}
}
}
void showone(int c) /* The output 1 Student information */
{
printf(" Student id :%s\n",stu[c].xuehao);
printf(" The name :%s\n",stu[c].name);
printf(" gender :%s\n",stu[c].sex);
printf(" age :%d\n",stu[c].age);
printf(" Native place :%s\n",stu[c].jiguan);
printf(" The phone :%s\n",stu[c].dianhua);
printf(" departments :%s\n",stu[c].yuanxi);
printf(" The class :%s\n",stu[c].banji);
}
void chazhao()// Find information about a student
{
system("cls");
FILE*fp;
int a1,b1,c1,d1,e1,n,i;
char t[10];
n=load();
printf(" Please enter the student id or name you are looking for: ");
scanf("%s",t);
for(i=0; i<n; i++)
if (!strcmp(stu[i].xuehao,t)||!strcmp(stu[i].name,t))
{
printf(" Student id :%s\n",stu[i].xuehao);
printf(" The name :%s\n",stu[i].name);
printf(" gender :%s\n",stu[i].sex);
printf(" age :%d\n",stu[i].age);
printf(" Native place :%s\n",stu[i].jiguan);
printf(" The phone :%s\n",stu[i].dianhua);
printf(" departments :%s\n",stu[i].yuanxi);
printf(" The class :%s\n",stu[i].banji);
printf(" Do you want to continue searching? Continue to: 1 Return to the main menu: 2\n");
scanf("%d",&c1);
switch(c1)
{
case 1:
chazhao();
return ;
case 2:
system("cls");
menu();
return;
}
}
if (strcmp(stu[i].xuehao,t)||strcmp(stu[i].name,t))
{
printf(" No student information! \n");
printf(" Do you want to continue searching? Continue to: 1 Return to the main menu: 2\n");
scanf("%d",&b1);
switch(b1)
{
case 1:
chazhao();
return;
case 2:
menu();
return ;
}
}
}
void shuliang()
{
system("cls");
int n,h;
n=load();
printf(" A total of %d Student records .\n",n);
if(n==0)
{
printf(" No student information! \n");
system("pause");
menu();
}
else
{
printf(" Does it display student information? \n is :1 no :2\n");
scanf("%d",&h);
if(h==1)
{
show();
}
else
{
menu();
}
}
menu(); /* Return to main function */
}
int main()
{
shouye();
denglu();
int test=1;
while(test)
{
switch(menuchoose())
{
case 0:
test=0;
printf("\n ^-^ Thank you for using !^-^ \n");
printf(" The code is a little long, the error is also a little much, hope to forgive ^-^\n");
break;
case 1:// Increase student status information
add();
break;
case 2:// Delete a student information
del();
break;
case 3:// Display student information
show();
break;
case 4:// Modify student information
xiugai();
break;
case 5:// Find information about a student
chazhao();
break;
case 6:
shuliang();// Show the number of student status
break;
}
}
return 0;
}