Question

Explain what the following UNIX command does: Is 'echo I.txt' Please type shell commands (for Windows. UNIX, or any other system that you like) for: creating a directory called hello world list the contents of this directory create a file called iwashere.txt display the contents of the file iwashere.txt from the command-line Please write a simple program in C for accepting a string from the command-line, reversing and printing the reversed string to standard output.

Answer 1

2.

#!/bin/bash
for i in `cat source.txt | sed '/^$/d;s/^ *//;s/ *$//'`;
do mkdir -p `dirname $i`;
touch `echo $(dirname $i)$(echo "/")$(basename $i)`;
done

3.

#include<stdio.h>
#include<conio.h>
void main()
{
int i, j, k;
char str[100];
char rev[100];
printf("Enter a string\t");
scanf("%s", str);
printf("The original string is %s", str);
for(i = 0; str[i] != '\0'; i++);
{
k = i-1;
}
for(j = 0; j <= i-1; j++)
{
rev[j] = str[k];
k--;
}
printf("The reverse string is %s", rev);
getch();
}