Answer:
#include <stdio.h>
int main()
{
int check;
char* dirname = "Subdir1";
check = mkdir(dirname,0766);
// check if directory is created or not
if (!check)
{
printf("Subdir1 Directory created\\");
char *dirname1="/Subdir1/D1";
if(mkdir("/Subdir1/D1", 0777)==-1)
{
printf("D1 Directory created\\");
int A1 = open ("/Subdir1/D1/A1.txt", 0666);
write(A1, "abcdefghij\\", strlen("abcdefghij\\"));
close(A1);
int A2 = open ("/Subdir1/D1/A2.txt", 0666);
write(A2, "you are beautiful\\", strlen("you are beautiful\\"));
close(A2);
int A3 = open ("/Subdir1/D1/A3.txt", 0666);
write(A3, "this is terrible!\\", strlen("this is terrible!\\"));
close(A3);
}
else
{
printf("Unable to create directory D1\\");
exit(1);
}
if(mkdir("/Subdir1/D2", 0777)==-1)
{
printf("D2 Directory created\\");
int B1 = open ("/Subdir1/D2/B1.ccc", 0664);
write(B1, "abcdefghij\\", strlen("abcdefghij\\"));
close(B1);
int B2 = open ("/Subdir1/D2/B2.ccc", 0664);
write(B2, "you are beautiful\\", strlen("you are beautiful\\"));
close(B2);
int B3 = open ("/Subdir1/D2/B3.ccc", 0664);
write(B3, "this is terrible!\\", strlen("this is terrible!\\"));
close(B3);
}
else
{
printf("Unable to create directory D2\\");
exit(1);
}
if(mkdir("/Subdir1/D3", 0777)==-1)
{
printf("D3 Directory created\\");
int C1 = open ("/Subdir1/D3/C1.txt", 0644);
write(C1, "abcdefghij\\", strlen("abcdefghij\\"));
close(C1);
int C2 = open ("/Subdir1/D3/C2.ddd", 0644);
write(C2, "you are beautiful\\", strlen("you are beautiful\\"));
close(C2);
int C3 = open ("/Subdir1/D3/C3.txt", 0644);
write(C3, "this is terrible!\\", strlen("this is terrible!\\"));
close(C3);
}
else
{
printf("Unable to create directory D2\\");
exit(1);
}
}
else {
printf("Unable to create directory Subdir1\\");
exit(1);
}
return 0;
}
Program 2:
#include <stdio.h>
long int findSize(char file_name[])
{
// opening the file in read mode
FILE* fp = fopen(file_name, "r");
// checking if the file exist or not
if (fp == NULL) {
printf("File Not Found!\\");
return -1;
}
fseek(fp, 0L, SEEK_END);
// calculating the size of the file
long int res = ftell(fp);
// closing the file
fclose(fp);
return res;
}
// Driver code
int main()
{
FILE *fptr1;
char c;
char file_name[] = {"D1.txt"};
long int res = findSize(file_name);
if (res != -1)
{
printf("Size of the file is %ld bytes \\", res);
if(res<=12)
{
fptr1 = fopen("D1.txt", "r");
c = fgetc(fptr1);
while (c != EOF)
{
fputc(c, fptr1);
c = fgetc(fptr1);
printf(c);
}
}
}
return 0;
}