Compilare: user.cpp: In function ‘int main()’: user.cpp:12:19: warning: unused variable ‘aux’ [-Wunused-variable] int n, m, i, j, aux, rot = 0, x; ^ user.cpp:12:24: warning: unused variable ‘rot’ [-Wunused-variable] int n, m, i, j, aux, rot = 0, x; ^ user.cpp:13:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^