Compilare: user.cpp: In function ‘int main()’: user.cpp:48:15: warning: unused variable ‘l1’ [-Wunused-variable] int m,n,p,l1,c1,l2,c2,i,k,j,ss=0; ^ user.cpp:48:18: warning: unused variable ‘c1’ [-Wunused-variable] int m,n,p,l1,c1,l2,c2,i,k,j,ss=0; ^ user.cpp:48:21: warning: unused variable ‘l2’ [-Wunused-variable] int m,n,p,l1,c1,l2,c2,i,k,j,ss=0; ^ user.cpp:48:24: warning: unused variable ‘c2’ [-Wunused-variable] int m,n,p,l1,c1,l2,c2,i,k,j,ss=0; ^ user.cpp:51:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&p); ^ user.cpp:52:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&m); ^ user.cpp:59:68: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d",&v[i].x1,&v[i].y1,&v[i].x2,&v[i].y2); ^