Question

can you please do this lab? use lunix or C program

its a continuation of a previous lab.

the previous lab:

Unix lab 4: compile and link multiple c or c++ files

Please do the following tasks step by step:

1. create a new directory named by inlab4
2. enter directory inlab4
3. create a new file named by reverse.c with the following contents and then close the file:

/*reverse.c */

#include <stdio.h>

reverse(char *before, char *after);

main()

{

      char str[100];    /*Buffer to hold reversed string */

      reverse("cat", str); /*Reverse the string "cat" */

      printf("reverse(\"cat\")=%s\n", str); /*Display result */

      reverse("noon", str); /*Reverse the string "noon" */

      printf("reverse(\"noon\")=%s\n", str); /*Display result */

     

}

reverse(char *before, char *after)

{

      int i;

      int j;

      int len;

      len=strlen(before);

      for(j=len-1, i=0; j>=0; j--, i++)

                  after[i]=before[j];

      after[len]=NULL;

}

4. type the following three commands and copy the results to a file which you will submit at the end of the lab:

gcc reverse.c –o reverse compile reverse.c to a file named reverse

ls –l reverse                list the information of file named by reverse

./reverse                                         run the executable file “reverse”

5. create a new file named by reverse.h with the following contents:

/* reverse.h */

reverse(char *before, char *after); /* declare but do not define this function */

6. modify your file of reverse.c to the following contents:

/*reverse.c */

#include <stdio.h>

#include "reverse.h"

reverse(char *before, char *after)

{

      int i;

      int j;

      int len;

      len=strlen(before);

      for(j=len-1, i=0; j>=0; j--, i++)

                  after[i]=before[j];

      after[len]=NULL;

}

7. create a new file named by main1.c with the following contents:

/*main.c */

#include <stdio.h>

#include "reverse.h"

main()

{

      char str[100];    /*Buffer to hold reversed string */

      reverse("cat", str); /*Reverse the string "cat" */

      printf("reverse(\"cat\")=%s\n", str); /*Display result */

      reverse("noon", str); /*Reverse the string "noon" */

      printf("reverse(\"noon\")=%s\n", str); /*Display result */

     

}

8. type the following five commands and copy the results to your file which you will submit.

gcc –c reverse.c            compile reverse.c to a file named reverse.o

gcc –c main1.c                compile main1.c to a file named main1.o

ls –l reverse.o main1.o

gcc reverse.o main1.o –o main1                      link object modules

main1                                                             run the executable file

- the new lab that i need help with:

Note: This inlab assignment is based on Unix lab Assignment 4.

Please do the following tasks step by step:

1. Log on your Unix account.
2. List all the directory and files under the current path, and you will find a directory named by inlab4. This is produced from our Unixlab4 Assignment.
3. copy all the contents of inlab4 to inlab6 (create the directory if you don’t have it), you can use the following command:

cp –r inlab4 inlab6

4. create a new file named by palindrome.h

/* PALINDROME.H */

int palindrome(); /* Declare but do not define */

5. create a new file named by palindrome.c:

/* palindrome.c */

#include "palindrome.h"

#include "reverse.h"

#include <string.h>

/*****************************************/

int palindrome(char *str)

{

        char reversedStr[100];

        reverse(str, reversedStr); /*Reverse original */

        return (strcmp(str, reversedStr)==0); /* compare the two */

}

6. create a new file named by main2.c:

/* main2.c */

#include <stdio.h>

#include "palindrome.h"

/*****************************************************/

main()

{

        printf("palindrome (\"cat\") = %d\n", palindrome("cat"));

        printf("palindrome (\"noon\") = %d\n", palindrome("noon"));

}

7. use the method we have used in lab4 to compile palindrome.c and main2.c, link all needed files and then run main2.
8. Now if you modify a little bit for reverse.c, then you have to recompile reverse.c, recompile palindrome.c, recompile main2.c, relink three objective files and then rerun it. That is, you have to retype four commands. Now we create a makefile and then put these commands in one file, and you can use one command to run these four commands.
9. create a new file named main1.make with the following contents:

main1:                  main1.o reverse.o

                              cc main1.o reverse.o -o main1

main1.o:               main1.c reverse.h

                              cc -c main1.c

reverse.o:             reverse.c reverse.h

                              cc -c reverse.c

10. create a new file named main2.make with the following contents:

main2:                  main2.o reverse.o palindrome.o

                              cc main2.o reverse.o palindrome.o -o main2

main2.o:               main2.c palindrome.h

                              cc -c main2.c

reverse.o:             reverse.c reverse.h

                              cc -c reverse.c

palindrome.o:      palindrome.c palindrome.h reverse.h

                              cc -c palindrome.c

11. type the following command and see the result

make –f main1.make

12. type the following command and see the result:

make –f main2.make

Answer 1

Result of program 1

ayush@ayush:~$ ./reverse
reverse("cat")=tac
reverse("noon")=noon

Result of program 2

ayush@ayush:~$ ./main1
reverse("cat")=tac
reverse("noon")=noon

Result of Program3

-

After modification

Result of make commands