Eroare de compilare: user.cpp: In function ‘void citire()’: user.cpp:32:36: error: ‘r’ was not declared in this scope c.mn=sqrt(c.x*c.x+c.y*c.y)-r; ^ user.cpp:44:38: error: too few arguments to function ‘bool cmp(cerc, cerc)’ sort(v[i].begin,v[i].end,cmp()); ^ user.cpp:17:6: note: declared here bool cmp(cerc c1, cerc c2) ^~~ user.cpp: In function ‘int cer2()’: user.cpp:53:24: error: cannot resolve overloaded function ‘begin’ based on conversion to type ‘int’ for(int j=v[i].begin; j!=v[i].end; j++) ^~~~~ user.cpp:53:32: error: invalid operands of types ‘int’ and ‘<unresolved overloaded function type>’ to binary ‘operator!=’ for(int j=v[i].begin; j!=v[i].end; j++) ~^~~~~~~~~~