Compilare: user.cpp: In function ‘int main()’: user.cpp:19:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:21:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d", a+i); ^ user.cpp:67:52: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] v.push_back(make_pair(i+1, poz + 1)); ^ user.cpp:49:47: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] v.push_back(make_pair(i+1, poz+1)); ^