Compilare: user.cpp: In function ‘void Execute_commands(Point*, Point*, std::vector<Operation>*, Position*)’: user.cpp:219:6: warning: unused variable ‘sq’ [-Wunused-variable] int sq=ops->size(); ^~ user.cpp: In function ‘void Print_operations(std::vector<Operation>*, FILE*)’: user.cpp:255:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ops->size();i++) ~^~~~~~~~~~~~ user.cpp: In function ‘void ReadMat(int, Point*, Point*, FILE*)’: user.cpp:241:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d ",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:272:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&n); ^