File Handling in C Language

File Handling in C Language 

File Handling

file handling is used for store a large amount of data in secondary file using different modes like write mode = "w", read mode  = "r" and append mode = "a" using different functions such as fopen(), fwrite(), fread(), fseek(), fprintf(), etc. file handling has the importance of reusability, portability, efficiency and storage. 

char range is= (0-255)

int range is = (-32768 - 32767)

File *fp range = unlimited.

program for file handling using *str i.e. unlimited string.

#include<stdio.h>

#include<conio.h>

main()

{

char *str;

clrscr();

printf("\n Enter the string= ");

fflush(stdin);

gets(str);

printf("\n The string is %s",str);

getch();

}

file handling for write mode

#include<stdio.h>

#include<conio.h>

main()

{

file *fp;

char ch;

clrscr();

fp=fopen("name.txt","w");

while((ch=getchar())!=EOF)

{

fputc(ch,fp);

}

fclose(fp);

}

getch();

}

file handling for append mode

#include<stdio.h>

#include<conio.h>

main()

{

file *fp;

char ch;

clrscr();

fp=fopen("name1.txt","a");

while((ch=getchar())!=EOF)

{

fput(ch,fp);

}

fclose(fp);

}

getch();

}

file handling for read mode

#include<stdio.h>

#include<conil.h>

main()

{

file *fp;

char ch;

clrscr();

fp=fopen("str1.c","r");

while((ch=getchar())!=EOF)

{

printf("%c",ch)

}

fclose(fp);

}

getch();

}