Eroare de compilare: user.cpp:6:12: error: ‘int y0’ redeclared as different kind of symbol int n,m,x0,y0; ^ In file included from /usr/include/features.h:357:0, from /usr/include/assert.h:37, from /usr/include/c++/4.8/cassert:43, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:33, from user.cpp:2: /usr/include/i386-linux-gnu/bits/mathcalls.h:242:1: error: previous declaration of ‘double y0(double)’ __MATHCALL (y0,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:42:15: error: assignment of function ‘double y0(double)’ y0=1; ^ user.cpp:42:15: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:46:9: warning: the address of ‘double y0(double)’ will always evaluate as ‘true’ [-Waddress] if(!y0) ^ user.cpp: In function ‘int cb(long double, long double)’: user.cpp:32:1: warning: control reaches end of non-void function [-Wreturn-type] } ^