How to Compare Last n Characters of A String to Another String in C

Question

Imagine that I have two strings, one of them is a url like \"/sdcard/test.avi\" and the other one is\"/sdcard/test.mkv\". I want to write an if statement that looks whether

Answer 1

#include 
#include 

int main(void)
{
    DIR *dir;
    struct dirent *ent;
    char files[100][500];
    int i = 0;

    memset(files, 0, 100*500);
    dir = opendir ("/sdcard/");
    if (dir != NULL)
    {
        /* Print all the files and directories within directory */
        while ((ent = readdir (dir)) != NULL)
        {
            strcpy(files[i], ent->d_name);
            if(strstr(files[i], ".avi") != NULL)
            {
                printf("\n files[%d] : %s is valid app file\n", i, files[i]);
                i++;
            }
        }
        closedir (dir);
    }
    return 0;
}