Compilare: user.cpp: In function ‘int main()’: user.cpp:73:23: warning: unused variable ‘nr’ [-Wunused-variable] int rooms[4], nr = 0; ^ user.cpp:44:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &m, &n); ^ user.cpp:47:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", &mat[i][0]); ^ user.cpp:96:90: warning: ‘bj’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout, "%d\n%d\n%d %d %d\n", int(rsize.size() - 1), rsize[k], bi + 1, bj + 1, bt); ^ user.cpp:96:90: warning: ‘bi’ may be used uninitialized in this function [-Wmaybe-uninitialized]