Ok cant get my head around this one :/
But basically i need to write a program that accpets input from a keyboard "JACK ROBINSON" then it manipulates the string to output INK SON ROB JAC...

Heres what i have so far:

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

void main()
{
     char *FullName="JACK ROBINSON";
     char *Input;
     char *Word1, *Word2, *Word3, *Word4;
     
do
{     
          printf("Please enter JACK Robinson: ");
          scanf("%s", Input);
          
          if(strcmp(Input,FullName)==0)// Checks to see if user entered "JACK ROBINSON" correctly
          {
              strncpy(Word4,FullName,3); // Copies JAC to Word4
              Word4[3] = '\0';
               //rest of manipulation to go here                       
          }
          else
          {
            printf("Please Try Again\n");
            }
}
while (strcmp(Input,FullName)!=0);

}

Now atm it crashes when i type in JACK ROBINSON or any incorrect data... any ideas why its doing this and also how to get the 3 other answers by manipulatin the string?
Many thanks,
Mark Hebden

if thats wat u want to do... jumbling up the letters of something then why dont u just transfer them to different arrays as u rquire and finish ur work of.. tht shudnt be difficult..

>void main()
*smack* Main returns int.

>atm it crashes when i type in JACK ROBINSON or any incorrect data...
I can answer your question with another question: Where do your pointers point? If you said "I don't know", you're right, and that's why your program crashes.

Thank you =)
Never been able to get my head around pointers but now i think ive cracked it :)
Ok heres what i got now

#include <stdio.h>
#include <string.h>
#define WORDSIZE 4

int main()
{
     char *FirstName="JACK", *LastName="ROBINSON";
     char *Input1, *Input2;
     char *Word1, *Word2, *Word3, *Word4;
     Word1 = (char *) malloc (WORDSIZE);
     Word2 = (char *) malloc (WORDSIZE);
     Word3 = (char *) malloc (WORDSIZE);
     Word4 = (char *) malloc (WORDSIZE);
     Input1 = (char *) malloc (5);
     Input2 = (char *) malloc (9);
do
{     
          printf("Please enter JACK: ");
          scanf("%s",Input1);
          
          if(strcmp(Input1,FirstName)==0)// Checks to see if user entered "JACK ROBINSON" correctly
          {
             do
             {
                printf("Please enter ROBINSON: ");
                scanf("%s",Input2);
          
                if(strcmp(Input2,LastName)==0)// Checks to see if user entered "JACK ROBINSON" correctly
                {                                                      
                strncpy(Word4,FirstName,3); // Copies JAC to Word4
                Word4[3] = '\0';
                
                strncpy(Word3,LastName,3); // Copies ROB to Word4
                Word3[3] = '\0';
                
               //rest of manipulation to go here 
             
               printf("Your name is now: %s\t %s\t %s\t %s\t", Word1, Word2, Word3, Word4);                      
                }
                else
                {
                printf("Please Try Again\n");
                }
          }
          while (strcmp(Input2,LastName)!=0);
          }
          else
          {
            printf("Please Try Again\n");
          }
}
while (strcmp(Input1,FirstName)!=0);

}

So any ideas on how to get INK and SON?

>now i think ive cracked it
You also need to free the memory you allocate. And don't cast the result of malloc. That way you'll get a warning telling you that you forgot to include stdlib.h. Why are you using pointers in the first place? In this case you could use arrays with not problem at all.

>So any ideas on how to get INK and SON?
That depends. Will this be a general algorithm that should work with any input? Or will you just be working with JACK ROBINSON in all possible cases?

It will always be JACK ROBINSON its an exam question. The pointers need to be there to show i know how to use them same with the strcmp and strcpy.
So basically it just needs to work as a one off. Stupid yea i know but its the way they want it.

printf("INK SON ROB JAC");

What I don't understand is how JACK ROBINSON becomes INK SON ROB JAC. How does the K end up placed in INK?

Dont ask me lol that what the question says... i have no idea how to do it :/

use strtok(firstname,"JAC") to get the string: "K\0" lets say its inkSEG1
like this: char *inkSEG1=strtok(FirstName,"JAC");
then char *strSEG2=strtok(LastName, "ROB");
now u have "K\0" and "INSON\0"
copy first 2 letters from strSEG2 to new segment lets say: strncpy(word1, strSEG2, 2);
rigth now all u need is to add them so..
strncat(word1,strSEG1,1);
now u have in word1 "INK"
to get "SON" is even easier look:
strSEG2= strtok(strSEG2,"IN");
now that we got "SON\0"
do this:
strncpy(word2,strSEG2,3);
and tadaaaaaaa u finished youre assingment!!!!!
hope i wasnt to late thought :P

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