File Management in C Languge

Formatted Input in a file

#include<stdio.h>

#include<conio.h>

void main()

{

int roll,i;

char nm[10],ct[10];

FILE *ft;

clrscr();

ft=fopen("abc.doc","w");

for(i=1;i<=3;i++)

{

printf("Enter %d'st roll>> ",i);

scanf("%d",&roll);

fflush(stdin);

printf("Enter %d'st name>> ",i);

gets(nm);

fflush(stdin);

printf("Enter %d'st City>> ",i);

gets(ct);

fprintf(ft,e"%d\t%s\t%s\n",roll,nm,ct);

}

}

Reading a records from file to structure

#include<stdio.h>

#include<conio.h>

struct stu

{

int roll;

char nm[20];

char city[20];

};

void main()

{

struct stu ob;

FILE *ft;

clrscr();

ft=fopen("abc.doc","r");

while(fscanf(ft,"%d%s%s",ob.roll,ob.nm,ob.city)!=EOF)

printf("\n\tRoll=%d\tName=%s\tCity=%s\n",ob.roll,ob.nm,ob.city);

getch();

}

Write a block in a file

#include<stdio.h>

#include<conio.h>

typedef struct stu

{

int roll;

char name[10];

char city[10];

}student ;

void main()

{

int i,j;

student ob;

FILE *fp=fopen("a.txt","w");

clrscr();

printf("Enter how many records you want to enter>> ");

scanf("%d",&i);

for(j=1;j<=i;j++)

{

printf("Enter %d'st roll>> ",j);

scanf("%d",&ob.roll);

fflush(stdin);

printf("Enter %d'st Name>> ",j);

gets(ob.name);

fflush(stdin);

printf("Enter %d'st City>> ",j);

gets(ob.city);

fwrite(&ob,sizeof(ob),1,fpe);

}

}