Compilare: main.cpp: In function 'int main()': main.cpp:139:47: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<point>::size_type {aka long unsigned int}' [-Wformat=] fprintf(outfile, "%d\n", Hullpoints.size()); ^ main.cpp:131:42: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(infile, "%d", &inputPointsNum); ^ main.cpp:134:64: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(infile, "%lf %lf", &(auxpoint.x), &(auxpoint.y)); ^