Compilare: user.cpp: In function ‘int main()’: user.cpp:17:20: warning: unused variable ‘l1’ [-Wunused-variable] int n,m,p,nr=0,l1,c1,i,x,y,xx,yy,j,ps,pi,k,mi,o,da=1; ^ user.cpp:17:23: warning: unused variable ‘c1’ [-Wunused-variable] int n,m,p,nr=0,l1,c1,i,x,y,xx,yy,j,ps,pi,k,mi,o,da=1; ^ user.cpp:17:48: warning: variable ‘mi’ set but not used [-Wunused-but-set-variable] int n,m,p,nr=0,l1,c1,i,x,y,xx,yy,j,ps,pi,k,mi,o,da=1; ^ user.cpp:17:51: warning: unused variable ‘o’ [-Wunused-variable] int n,m,p,nr=0,l1,c1,i,x,y,xx,yy,j,ps,pi,k,mi,o,da=1; ^ user.cpp:17:53: warning: variable ‘da’ set but not used [-Wunused-but-set-variable] int n,m,p,nr=0,l1,c1,i,x,y,xx,yy,j,ps,pi,k,mi,o,da=1; ^ user.cpp:20:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&m,&n,&p); ^ user.cpp:25:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^