Switch statement and returning the correct output

I have a large application that I tried to simplify into a small program in order to ask for help on this question.

Code:

---

static char *the_switch(int cw);
char *txt_ptr = "";

main()
{
        int cw;
        int v[3];
        int i;
        int j;

        v[0]=8;
        v[1]=8;
        v[2]=555;
        v[3]=8;

        for (i = 0; i < 4; i++)
        {
                cw = v[i];
                txt_ptr = the_switch(cw);
                printf("%s", txt_ptr);
        }
}

static char *the_switch(int cw)
{
        switch(cw)
                {
                case 8:
                        txt_ptr = "x";
                        return txt_ptr;
                case 555:
                        txt_ptr = "\\555\\";
                        return txt_ptr;
                case 444:
                        txt_ptr = "\\444\\";
                        return txt_ptr;
                case 333:
                        txt_ptr = "\\333\\";
                        return txt_ptr;
                default:
                        txt_ptr = "not a case";
                        return txt_ptr;
                }
}

---

If I had v[2] = 555 & v[3] = 8, then I need the output to be: \555\8
which is basically just adding a backslash before cw and then adding a backslash after cw and then printing the next number in the array which is 8. If v[2] was 444 and v[3] was 8, then I basically need the output to be the same: \444\8
And finally if v[1] was 333, v[2] was 8, and v[3] was 8, then I would need the output to look like this: \333\8\8

The code that I have above only gives me \555\ instead of \555\8 and obviously the other cases only give me that type of output too. What can I add to fix this in order to get the output that I'm looking for? I'm working with someone else's code, so I'm kind of restricted on how much I can change things. Any help is greatly appreciated. Thanks

The output in may machine is xx\555\x, which is the expected output after examining the code.

Just use 8 instead of "x" in the the_switch() function.

What in the world... ? Well here's my idea:

Code:

---

#include <stdio.h>

char separator (int *v)
{
    int *next = v;
    if (next && *++next)
        return '\\';
    else
        return '\0';
}

int main(void)
{
    int v[] = { 8, 444, 555, 333, };
    size_t size = sizeof v / sizeof v[0];
    int i;
    for (i = 0; i < size; ++i)
    {
        printf("%d%c", v[i], separator(&v[i]));
    }
    putchar('\n');
    return 0;
}

---

Owner@pavilion ~
$ ./a
8\444\555\333

Will something like that work for you?

Or just something like:

Code:

---

printf("\\%d\\%d\\%d\n", v[1], v[2], v[3]);

---

fnoyan - yes, i do see that my example would produce the correct output if the x in the switch statement was an 8.

However, how would I do "And finally if v[1] was 333, v[2] was 8, and v[3] was 8, then I would need the output to look like this: \333\8\8" with the switch statement that I have in place??? The problem with changing things around as citizen and itsme86 suggested is the fact that I have pre-existing code that has MANY other cases besides mine. I only have to add these 3 cases to the switch statement, but I'm having a really hard time figuring out how to get the output look as I need it for case 333. Your help is always appreciated.

Why do your cases ever return a trailing \
It looks like you always want \#

I would think your cases should be more like...

Code:

---

"\\8"
"\\333"
"\\555"
...

---

Though I don't seen any sense in using that method to print a \ in front of a number.

This is your code, but with some modification

Code:

---

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

void the_switch(int cw);
char *txt_ptr;

int main()
{
        int cw;
        int v[3];
        int i;
        int j;
        txt_ptr = malloc(80);
        strcpy(txt_ptr,"");
       
        v[0]=8;
        v[1]=8;
        v[2]=555;
        v[3]=8;
        for (i = 0; i < 4; i++)
        {
                cw = v[i];
                the_switch(cw);
                  printf("%s\n",txt_ptr);
        }
       
        getchar();
        return 0;
}

void the_switch(int cw)
{
        switch(cw)
                {
                case 8:
                        strcat(txt_ptr,"\\x");
                        break;
                case 555:
                        strcat(txt_ptr,"\\555");
                        break;
                case 444:
                        strcat(txt_ptr,"\\444");
                        break;
                case 333:
                        strcat(txt_ptr,"\\333");
                        break;
                default:
                        strcat(txt_ptr, "\0");
                }
}         

/*my output
\x
\x\x
\x\x\555
\x\x\555\x
*/

---

I guess this will do what u want. u need to just change X to 8 to display like \333\8\8 for 333,8,8

ssharish2005