Compilare: user.cpp: In function ‘int main()’: user.cpp:113:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=drx.size()-1;i++){ ~^~~~~~~~~~~~~~ user.cpp:116:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<=stgx.size()-1;i++){ ~^~~~~~~~~~~~~~~ user.cpp:32:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, ii, jj, n, h, lg, cont; ^ user.cpp:32:15: warning: variable ‘ii’ set but not used [-Wunused-but-set-variable] int i, j, ii, jj, n, h, lg, cont; ^~ user.cpp:32:19: warning: variable ‘jj’ set but not used [-Wunused-but-set-variable] int i, j, ii, jj, n, h, lg, cont; ^~ user.cpp:32:29: warning: unused variable ‘lg’ [-Wunused-variable] int i, j, ii, jj, n, h, lg, cont; ^~ user.cpp:32:33: warning: variable ‘cont’ set but not used [-Wunused-but-set-variable] int i, j, ii, jj, n, h, lg, cont; ^~~~ user.cpp:36:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &n); ^ user.cpp:38:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lf%lf", &v[i].x, &v[i].y); ^