Compilare: user.cpp: In function ‘int main()’: user.cpp:31:31: warning: unused variable ‘x’ [-Wunused-variable] int n,m,k,i,j,x1,y1,x2,y2,x,y,dmin=99999,d,nr1=0,nr2=0,d1=999999,d2=999999,ras,ras1,ras2; ^ user.cpp:31:33: warning: unused variable ‘y’ [-Wunused-variable] int n,m,k,i,j,x1,y1,x2,y2,x,y,dmin=99999,d,nr1=0,nr2=0,d1=999999,d2=999999,ras,ras1,ras2; ^ user.cpp:31:46: warning: unused variable ‘d’ [-Wunused-variable] int n,m,k,i,j,x1,y1,x2,y2,x,y,dmin=99999,d,nr1=0,nr2=0,d1=999999,d2=999999,ras,ras1,ras2; ^ user.cpp:32:57: 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%d%d",&n,&m,&k,&x1,&y1,&x2,&y2); ^ user.cpp:34:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d",&p[i].x,&p[i].y); ^