Compare last instance of two strings

#include

#include

int main(void) {
char name[] = "file.cf";
char nona[] = "file.db";

printf("testing for `.db' extension\n");
printf("--\n");

if(strcmp((name + (strlen(name) - 3)), ".db"))
printf("NOT valid : %s\n", name);
else
printf("valid : %s\n", name);

if(strcmp((nona + (strlen(nona) - 3)), ".db"))
printf("NOT valid : %s\n", nona);
else
printf("valid : %s\n", nona);

printf("\n");

return 0;
}