Compilare: user.cpp: In function ‘void dvd(int, int, int&)’: user.cpp:22:29: warning: operation on ‘pj’ may be undefined [-Wsequence-point] pi=pi^pj^(pj=pi); ^ user.cpp: In function ‘int main()’: user.cpp:55:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(g,"%i %i", &v.n,&f.n); ^ user.cpp:57:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(g,"%f%f", &v.x[i], &v.y[i]); ^ user.cpp:59:43: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(g,"%f%f", &f.x[i], &f.v[i]); ^