/*padding ytwo char*/

#include<stdio.h>
#include<string.h>
#include<stdlib.h>

void char_pad();
void bit_representation( int num);

int main()
{
char_pad();
}
void char_pad()
{
int num =0;
char ch;
printf(“enter first char :”);
ch = getchar();
num = num << 8;
num = num | ch;
printf(“num is : %d\n”,num);
while( getchar() != ‘\n’);

printf(“enter second char :”);
ch = getchar();
num = num <<8;
num = num | ch;
printf(“num is : %d\n”,num);
bit_representation(num);
}

void bit_representation( int num)
{
int temp,loc;
int i,j;
for(i=0; i<4; i++)
{
temp = num;
temp = temp <<(8 * i);

temp = temp >>(24)
printf(“temp is : %d\n”,temp);
for(j=0; j<8; j++)
{
loc = temp;

loc = loc << (24 +j);
loc = loc >>31;
printf(“%d”,loc);
}
printf(“\n”);
}
}

everything is working fine but my function is not

checking EOF. It is not coming out of loop even if

i had applied a condition (if character is equal to EOF

).

/*main file

File name : file_main.c*/

#include”myheader.h”

int main(int argc,char *arg[])
{
int fptr,ch;
fptr = open(arg[1],O_RDONLY);
if(fptr == -1)
{
perror(“file does not exist \n”);
exit(EXIT_FAILURE);
}
while(1)
{
printf(“press 1: to read 2: to copy to another file 3: to compress4: exit”);
scanf(“%d”, &ch);
switch(ch)
{
case 1: read_file(fptr);
break;
case 2: copy_file(fptr);
break;
case 3: compress_file(fptr);
break;
case 4: exit(0);
}
}
}

/*file functions.c — function definitions are

present in this file*/

/* file name : file_functions.c*/

#include”myheader.h”

void read_file(int fptr)
{
char ch = ”;
int i;
read(fptr,&ch,1);
while(1)
{
if(i != 0)
{
write(1,&ch,1);
}
i = read(fptr,&ch,1);
if(ch == EOF)
{
printf(“******* FILE COMPLETE ********\n”);
break;
}
}
}

void copy_file(int fptr)
{
int file_d,i;
char ch = ”;
file_d = open(“copy.txt”,O_CREAT | O_WRONLY);
if(file_d == -1)
{
perror(“ERROR IN COPY FUNCTION : \n”);
exit(EXIT_FAILURE);
}
while(1)
{
i = read(fptr,&ch,1);
if(i == 0)
{
continue;
}
if(ch == EOF)
{
break;
}
i = write(file_d,&ch,1);
while(i == 0)
{
i = write(file_d, &ch,1);
}
}
}

void compress_file(int fptr)
{
}

/*make file */

FILE:file_functions.o file_main.o
gcc -o FILE file_main.o file_functions.o
file_main.o:file_main.c myheader.h
gcc -g -c file_main.c
file_functions.o:file_functions.c myheader.h
gcc -g -c file_functions.c

clean:
rm *.o
rm FILE copy.txt