Compilare: user.cpp: In function ‘int main()’: user.cpp:113:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d%d",&M,&N,&F,&Dx,&Dy);//Read(M),Read(N),Read(F),Read(Dx),Read(Dy); ^ user.cpp:115:73: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d%d%d",&v[i].x1,&v[i].y1,&v[i].x2,&v[i].y2,&v[i].cost);//Read(v[i].x1),Read(v[i].y1),Read(v[i].x2),Read(v[i].y2),Read(v[i].cost); ^