Student Record Book.c

#include<stdio.h>
#include<conio.h>
static int n=0;
struct STUDENT
{
	int age,roll_no,maths,physics,chemistry,total;
	char name[10];
	float avg;
};
int main()
{
	void add();
	void password();
	void displayAll();
	void record();
	void del();
	void marksheet();
	void modify();
	void changePassword();
	int i,count=0,a,n=0,r,m,ms;
	printf("\n\t\t\t\t========================================================\n");
	printf("\n\t\t\t\t\t\t   STUDENT RECORD BOOK\n");
	printf("\n\t\t\t\t========================================================\n");

		while(1)
		{
		printf("\n----------------------");
		printf("\nchoose an option below");
		printf("\n----------------------");
		printf("\n1.Add a record");
		printf("\n2.Delete a record");
		printf("\n3.Modify a record");
		printf("\n4.Generate Mark Sheet");
		printf("\n5.Search a record");
		printf("\n6.Display all records");
		printf("\n7.exit");
		printf("\n----------------------\n");
		scanf("%d",&a);
		switch (a)
		{
			case 1:
			{
				password();
				add();
				break;
			}
			case 2:
			{
				password();
				del();
				break;
			}
			case 3:
			{
				password();
				modify();
				break;
			}
			case 4:
			{
				marksheet();
				break;
			}
			case 5:
			{
				record();
				break;
			}
			case 6:
			{
				displayAll();
				break;
			}
			case 7:
			{
				exit(0);
			}

		}
	}
}
void add()
{
		int i;
		struct STUDENT s;
		int size;
		FILE *fp;
		size=sizeof(s);
		fp=fopen("MINI_PROJECT_IN_C.DAT","ab");
 		printf("\nenter roll no for record\n");
		scanf("%d",&s.roll_no);
		printf("enter name\n");
		scanf("%s",s.name);
		printf("enter age\n");
		scanf("%d",&s.age);
		printf("enter maths marks\n");
		scanf("%d",&s.maths);
		printf("enter physics marks\n");
		scanf("%d",&s.physics);
		printf("enter chemistry marks\n");
		scanf("%d",&s.chemistry);
		s.total=s.maths+s.physics+s.chemistry;
		s.avg=s.total/3;
		fwrite(&s,size,1,fp);
		fclose(fp);
		printf("\nrecord successfully added");
}

void password()
{
	FILE *fp;
	int i=0,count=0;
	printf("\nenter password");
	char ch[6],c[6],a,b;
	fp=fopen("password.txt","r");
	while((b=getc(fp))!=EOF)
		{
		c[i]=b;
		i++;
		}
	for(i=0;i<6;i++)
	{
	a=getch();
	ch[i]=a;
	printf("*");
	if(ch[i]==c[i])
	{
		count++;
	}
	}
	if(count==6)
	{
		printf("\nlogin success");
	}
	else
	{
		printf("\nlogin failed re ");
		password();
	}
	fclose(fp);
}
void displayAll()
{
FILE *fp;
struct STUDENT s;

fp=fopen("MINI_PROJECT_IN_C.DAT","rb");

printf("\n========================================================\n\n");
printf("\t\t All Student Details\n\n");
printf("========================================================\n\n");


while(1)
{
fread(&s,sizeof(s),1,fp);

if(feof(fp))
{
break;
}
		printf("\nrollno:%d\t",s.roll_no);
		printf("name:%s\t",s.name);
		printf("age:%d\t",s.age);
		printf("total:%d\n",s.total);
}
printf("========================================================\n\n");

fclose(fp);
}
void record()
{
FILE *fp;
struct STUDENT s;
int id,found=0;
fp=fopen("MINI_PROJECT_IN_C.DAT","rb");
printf("\nEnter the student roll no:");
scanf("%d",&id);
while(1)
{
fread(&s,sizeof(s),1,fp);
if(feof(fp))
{
break;
}
if(s.roll_no==id)
{
found=1;
printf("\n========================================================\n\n");
printf("\t\t Student Record of %d\n\n",s.roll_no);
printf("========================================================\n\n");

		printf("rollno:%d\t",s.roll_no);
		printf("name:%s\t",s.name);
		printf("age:%d\t",s.age);
		printf("total:%d\n",s.total);

printf("========================================================\n\n");
}
}
if(found==0)
{
printf("\nSorry No Record Found");
}
fclose(fp);
}
void del()
{
FILE *fp,*fp1;
struct STUDENT s,s1;
int id,found=0;

fp=fopen("MINI_PROJECT_IN_C.DAT","rb");
fp1=fopen("temp.dat","wb");

printf("\nEnter student roll no you want to Delete:");
scanf("%d",&id);
while(1)
{
fread(&s,sizeof(s),1,fp);

if(feof(fp))
{
break;
}
if(s.roll_no==id)
{
found=1;
}
else
{
fwrite(&s,sizeof(s),1,fp1);
}
}
fclose(fp);
fclose(fp1);

if(found==0)
{
printf("Sorry No Record Found\n\n");
}
else
{
fp=fopen("MINI_PROJECT_IN_C.DAT","wb");
fp1=fopen("temp.dat","rb");

while(1)
{
fread(&s,sizeof(s),1,fp1);

if(feof(fp1))
{
break;
}
fwrite(&s,sizeof(s),1,fp);
}
}
fclose(fp);
fclose(fp1);
}
void marksheet()
{
FILE *fp;
struct STUDENT s;
int id,found=0;
fp=fopen("MINI_PROJECT_IN_C.DAT","rb");
printf("\nEnter the student roll no:");
scanf("%d",&id);
while(1)
{
fread(&s,sizeof(s),1,fp);
if(feof(fp))
{
break;
}
if(s.roll_no==id)
{
found=1;
printf("\n========================================================\n\n");
printf("\t\t Student Marksheet of %d\n\n",s.roll_no);
printf("========================================================\n\n");

		printf("rollno:%d\t",s.roll_no);
		printf("name:%s\t",s.name);
		printf("maths:%d\t",s.maths);
		printf("physics:%d\t",s.physics);
		printf("chemistry:%d\t",s.chemistry);
		printf("total:%d\t",s.total);
		printf("average:%2f\n",s.avg);

printf("========================================================\n\n");
}
}
if(found==0)
{
printf("\nSorry No Record Found");
}
fclose(fp);
}
void modify()
{
FILE *fp,*fp1;
struct STUDENT s;
int id,found=0;

fp=fopen("MINI_PROJECT_IN_C.DAT","rb");
fp1=fopen("temp.dat","wb");

printf("\nEnter student roll no you want to Modify:");
scanf("%d",&id);

while(1)
{
fread(&s,sizeof(s),1,fp);

if(feof(fp))
{
break;
}
if(s.roll_no==id)
{
found=1;
		printf("enter roll no for record\n");
		scanf("%d",&s.roll_no);
		//fflush(stdin);
		printf("enter name\n");
		scanf("%s",s.name);
		printf("enter age\n");
		scanf("%d",&s.age);
		printf("enter maths marks\n");
		scanf("%d",&s.maths);
		printf("enter physics marks\n");
		scanf("%d",&s.physics);
		printf("enter chemistry marks\n");
		scanf("%d",&s.chemistry);
		s.total=s.maths+s.physics+s.chemistry;
		s.avg=s.total/3;
fwrite(&s,sizeof(s),1,fp1);
}
else
{
fwrite(&s,sizeof(s),1,fp1);
}
}
fclose(fp);
fclose(fp1);

if(found==0)
{
printf("Sorry No Record Found\n\n");
}
else
{
fp=fopen("MINI_PROJECT_IN_C.DAT","wb");
fp1=fopen("temp.dat","rb");

while(1)
{
fread(&s,sizeof(s),1,fp1);

if(feof(fp1))
{
break;
}
fwrite(&s,sizeof(s),1,fp);
}

}
fclose(fp);
fclose(fp1);
}
void changePassword()
{
	FILE *fp;
	int i;
	char ch[6],c[6],count=0;
	fp=fopen("password.txt","w");
	printf("\nenter new password with 6 character: ");
	scanf("%s",ch);
	printf("\nre-enter password: ");
	scanf("%s",c);
	for(i=0;i<6;i++)
	{
		if(ch[i]==c[i])
		count++;
	}
	if(count==6)
	{
	fprintf(fp,"%s",ch);
	printf("\npassword successfully changed");
	}
	else
	{
		printf("\nnot matching");
		changePassword();
	}
	fclose(fp);
}