Compilare: user.c: In function ‘main’: user.c:18:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("convertor.out", "wt", stdout); ^ user.c: In function ‘solveKeys’: user.c:50:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(str, 1025, pFile); ^ user.c:56:24: warning: ‘ptr1’ may be used uninitialized in this function [-Wmaybe-uninitialized] strncpy(aux, ptr1 + 1, str + i - ptr1 - 1); ^