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PL 6

The document contains a C program that manages student records, allowing users to insert, search, modify, delete, and display records stored in a text file. It defines a structure for student data and implements various functions to handle file operations and user interactions. The program runs in a loop until the user chooses to exit, providing a simple text-based interface for managing student information.

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9 views3 pages

PL 6

The document contains a C program that manages student records, allowing users to insert, search, modify, delete, and display records stored in a text file. It defines a structure for student data and implements various functions to handle file operations and user interactions. The program runs in a loop until the user chooses to exit, providing a simple text-based interface for managing student information.

Uploaded by

artisinghmpsagar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
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#include<stdio.

h>
#include<stdlib.h>
typedef struct student
{
int roll_no;
char name[20];
float marks;
}stud;
void search();
void insert();
void modify();
void delete();
void print();
FILE *masters,*temps;
void main()
{
int ch,roll;
if(!(masters=fopen("masters.txt","r+")))
masters=fopen("masters.txt","w+");
do
{
printf("\n 1. Insert a record\n 2. Search a record\n 3. Modify a record\n 4.
Delete a record\n 5.Display the record\n 6. Exit\n Enter your choice : ");
scanf("%d",&ch);
switch(ch)
{
case 1:
insert();
break;
case 2:
search();
break;
case 3:
modify();
break;
case 4:
delete();
break;
case 5:
print();
break;
case 6:printf("\n Have a nice day!! \n");
break;
default:printf("\n Invalid choice!! please enter your choice again \n");
break;
}
}while(ch!=6);
}

void insert()
{
stud st;
fseek(masters,0,2);
printf("\n Enter the name,roll no. and marks : ");
scanf("%s %d %f",st.name,&st.roll_no,&st.marks);
fprintf(masters,"%s\t%d\t%6.2f\n",st.name,st.roll_no,st.marks);
fclose(masters);
masters=fopen("masters.txt","r+");
}
void search()
{
stud st;
int roll;
printf("\n Enter the roll no. that you want to search for : ");
scanf("%d",&roll);
rewind(masters);
while(!feof(masters))
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
if(st.roll_no==roll)
{
printf("\n Record found.");
printf("\n%d\t%s\t%6.3f",st.roll_no,st.name,st.marks);
return;
}
}
printf("\n Record not found.");
}

void delete()
{
stud st;
int recno,i;
printf("\n Enter the record no. that is to be deleted : ");
scanf("%d",&recno);
temps=fopen("temps.txt","w+");
rewind(masters);
for(i=1;i<recno && !feof(masters);i++)
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
fprintf(temps,"%s\t%d\t%f\n",st.name,st.roll_no,st.marks);
}
if(feof(masters))
printf("\n Record out of range");
else
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
while(!feof(masters))
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
fprintf(temps,"%s\t%d\t%f\n",st.name,st.roll_no,st.marks);
}
fclose(masters);
fclose(temps);
masters=fopen("masters.txt","w+");
temps=fopen("temps.txt","r+");
while(!feof(temps))
{
fscanf(temps,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
fprintf(masters,"%s\t%d\t%6.3f\n",st.name,st.roll_no,st.marks);
}
}
close(temps);
}

void print()
{
stud st;
rewind(masters);
printf("\nName\tRoll no.\tMarks");
while(!feof(masters))
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
printf("\n%s\t%d\t\t%6.3f",st.name,st.roll_no,st.marks);
}
}

void modify()
{
stud st;
int recno,i;
printf("\n Enter the record no. that is to be modified : ");
scanf("%d",&recno);
temps=fopen("temps.txt","w+");
rewind(masters);
for(i=1;i<recno && !feof(masters);i++)
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
fprintf(temps,"%s\t%d\t%6.3f\n",st.name,st.roll_no,st.marks);
}
if(feof(masters))
printf("\n Record out of range");
else
{
fscanf(masters,"%s\t%d\t%f\n",st.name,&st.roll_no,&st.marks);
printf("\n Enter the new name,roll no. and marks :");
scanf("%s %d %f",st.name,&st.roll_no,&st.marks);
fprintf(temps,"%s\t%d\t%6.3f\n",st.name,st.roll_no,st.marks);
while(!feof(masters))
{
fscanf(masters,"%s%d%f\n",st.name,&st.roll_no,&st.marks);
fprintf(temps,"%s\t%d\t%6.3f\n",st.name,st.roll_no,st.marks);
}
fclose(masters);
fclose(temps);
masters=fopen("masters.txt","w+");
temps=fopen("temps.txt","r+");
while(!feof(temps))
{
fscanf(temps,"%s%d%f\n",st.name,&st.roll_no,&st.marks);
fprintf(masters,"%s\t%d\t%6.3f\n",st.name,st.roll_no,st.marks);
}
}
fclose(temps);
}

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