Compilare: user.cpp: In function ‘int main()’: user.cpp:91:39: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘std::stack<coordonata>::size_type {aka unsigned int}’ [-Wformat=] fprintf(out, "%ld\n", final.size()); ^ user.cpp: In function ‘void citire()’: user.cpp:31:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%ld\n", &nr_puncte); ^ user.cpp:33:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lf %lf\n", &punct[i].x, &punct[i].y); ^