get file extension

Hello
in my program i go to specific directry .From this directry i read files names and write them in the console BUT my problem is the following i want to display the names of files has (s) extension like the follwoing :
a.s
b.s
a.txt
now my approach to display files names which has extension s
a
b
so i did already program display all files in directry BUT

1 . how i can chech for file extension
2.how i can display the file name without its extension

Thanks a lot

You could use the library function strrchr() to get a pointer to the '.'. The characters after that will be the extension and the characters before will be the filename.

Code:

---

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


int main()
{

        char* ext;
        char* p;
        char fullname []="file.txt";
        ext = strchr(fullname,'.');
        printf("extension - %s\nfilename - ",ext+1);
        for(p=fullname;p!=ext;p++)
        {
                printf("%c",*p);
        }
        printf("\n");
       
}

---

/******
The following code should work for all combinations of file names you might have.
The different types are:
c:\user\myfile.dat
testfile.dat
data
c:\thisfile

Just call the function StripFileName with your file name. The parsed name is returned in NewFileName.
****/

Code:

---

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

/*************** PROTOTYPES ************************/

static void StripFileName(char *FileName, char *NewFileName);

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

int main(int argc, char* argv[])
{
       
        char FileName[31];
        char NewFileName[31];

        strcpy(FileName, "c:\\user\\myfile.dat");
        StripFileName(FileName, NewFileName);
        printf("(%s)\n", NewFileName);

        strcpy(FileName, "testfile.dat");
        StripFileName(FileName, NewFileName);
        printf("(%s)\n", NewFileName);

        strcpy(FileName, "data");
        StripFileName(FileName, NewFileName);
        printf("(%s)\n", NewFileName);

        strcpy(FileName, "c:\\thisfile");
        StripFileName(FileName, NewFileName);
        printf("(%s)\n", NewFileName);

        return 0;
}

static void
StripFileName(char *FileName, char *NewFileName)
{
        int PLocation;
        int i;
        int x;

        i = strlen(FileName) - 1;

        /* LOOK FOR THE PERIOD OR THE BEGINNING OF THE FILE NAME */
        while (i && FileName[i] != '.')
        {
                i--;
        }

        /* IF I IS > 0, THE FILE NAME HAS A PERIOD */
        if (i)
        {
                PLocation = i;
        }
        else
        {
                /* NO PERIOD, SO COPY TO THE END OF THE FILE NAME */
                PLocation = strlen(FileName);

                /* RESET i TO LOOK FOR THE FIRST PATH NAME SEPARATOR, SINCE i WENT TO ZERO LOOKING FOR A PERIOD */
                i = strlen(FileName) - 1;
        }

        /* SEARCH FOR THE FIRST PATH NAME SEPARATOR, IF THERE IS ONE */
        while (i && FileName[i] != '\\')
        {
                if (FileName[i] != '\\')
                        i--;
        }

        /* IF THERE IS A SEPARATOR, WE NEED TO GO FORWARD 1 CHARACTER */
        if (FileName[i] == '\\')
                i++;
               
        x = 0;

        /* COPY FROM THE SEPARATOR (OR THE BEGINNING OF THE FILE NAME IF NO SEPARATOR) TO LOCATION OF THE PERIOD */
        while (i < PLocation)
        {
                NewFileName[x] = FileName[i];
                x++;
                i++;
        }
        /* PLACE A NULL AT THE END WHEN WE'RE DONE COPYING */
        NewFileName[x] = '\0';
}

---

Thaaaaaanks a lot for support