Thread: Redirect stdout using dup

Code:

int main(int argc, char *argv[])
{
        int f = open("test.txt", O_CREAT|O_RDWR, 0666);
        int out=dup(1);

        if(f==-1)
                perror("open()");

        dup2(f, 1);

        printf("Hello world\n");

        printf("%d\n",close(f));
        close(1);

        printf("test\n");

        return 0;
}

I want to redirect stdout to a file ... and after I print something I want to go back to print to the usual screen output. I can't get back to printing on the screen

Please help!