Eroare de compilare: user.cpp:9:48: error: ‘int y1’ redeclared as different kind of symbol int p,mat[Nmax][Nmax],v[Nmax*Nmax],n,m,q,x1,x2,y1,y2,k,nr; ^~ In file included from /usr/include/features.h:367:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/os_defines.h:39, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/c++config.h:507, from /usr/include/c++/6/cassert:43, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/stdc++.h:33, from user.cpp:1: /usr/include/bits/mathcalls.h:251:1: note: previous declaration ‘double y1(double)’ __MATHCALL (y1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:46:25: error: invalid conversion from ‘double (*)(double) throw ()’ to ‘int’ [-fpermissive] read(x1);read(y1);read(x2);read(y2);read(k); ^ user.cpp:14:6: note: initializing argument 1 of ‘void read(int&)’ void read(int &x){ ^~~~ user.cpp:46:25: error: cannot bind rvalue ‘(int)y1’ to ‘int&’ read(x1);read(y1);read(x2);read(y2);read(k); ^ user.cpp:49:25: error: invalid conversion from ‘double (*)(double) throw ()’ to ‘int’ [-fpermissive] for (int j2=y1;j2<=y2;j2++) ^~