1 #include <assert.h> 2 #include <stdio.h> 3 main()4int main() { 5 FILE* file_orig = fopen("/sandbox/input.txt", "r"); 6 assert(file_orig != NULL); 7 FILE* file_new = freopen("/sandbox/input2.txt", "r", file_orig); 8 assert(file_new != NULL); 9 10 int c = fgetc(file_new); 11 while (c != EOF) { 12 int wrote = fputc((char)c, stdout); 13 assert(wrote != EOF); 14 c = fgetc(file_new); 15 } 16 } 17