Compilare: user.cpp: In function ‘int main()’: user.cpp:35:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < segm.size(); j++) { ^ user.cpp:26:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&n); ^ user.cpp:28:49: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&pts[i].x,&pts[i].y); ^