Eroare de compilare: user.c: In function ‘write’: user.c:143:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] fprintf(stdout, "%d", answer[result[val][j]]); ^ user.c:147:9: warning: array subscript has type ‘char’ [-Wchar-subscripts] fprintf(stdout, "%d", answer[result[j][val]]); ^ user.c: In function ‘main’: user.c:158:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d %d", &task, &N); ^ user.c:161:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &val); ^ user.c:175:10: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("magic.out", "w", stdout); ^ /tmp/ccZULZyn.o: In function `main': user.c:(.text.startup+0x499): undefined reference to `bkt' collect2: error: ld returned 1 exit status