The program opens a file, prints in a loop and then closes it. Moving the file to another location, (`mv file.txt file1.txt`) during the loop does not cause any exception or error. At the end of the program, `file1.txt` has the proper output.

hello.c

#include <stdio.h>

main(){
    printf("Hello there!\n");
    FILE *f = fopen("/tmp/file.txt", "w");
    if(f == NULL){
        printf("Error opening file!\n");
        return 1;
    }

    int i = 0;

    for(i=0; i<20;i++){
        fprintf(f, "%d\n", i);
        printf("Printing %d\n", i);
        sleep(1);
    }
    fclose(f);
    return 0;
}