Compilare: user.cpp: In function ‘int main()’: user.cpp:77:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &n ) ; ^ user.cpp:80:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &v[i]) ; ^ user.cpp:82:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &m ) ; ^ user.cpp:85:67: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d%d", &q[i].i, &q[i].j, &q[i].x, &q[i].y ) ; ^