redirecting standard output in c then resetting standard output

Question

I'm trying to use redirects in C to redirect input to one file and then set standard output back to print to the screen. Could someone tell me what's wrong with this code?

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

int main(int argc, char** argv) {
    //create file "test" if it doesn't exist and open for writing setting permissions to 777
    int file = open("test", O_CREAT | O_WRONLY, 0777);
    //create another file handle for output
    int current_out = dup(1);

    printf("this will be printed to the screen\n");

    if(dup2(file, 1) < 0) {
        fprintf(stderr, "couldn't redirect output\n");
        return 1;
    }

    printf("this will be printed to the file\n");

    if(dup2(current_out, file) < 0) {
        fprintf(stderr, "couldn't reset output\n");
        return 1;
    }

    printf("and this will be printed to the screen again\n");

    return 0;
}

Answer 1

Your second dup2 call is wrong, replace with:

if (dup2(current_out, 1) < 0) {