Eroare de compilare: user.cpp:12:8: error: ‘int j1’ redeclared as different kind of symbol int i1,j1,i2,j2,vt; ^ 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:1: /usr/include/i386-linux-gnu/bits/mathcalls.h:240:1: error: previous declaration of ‘double j1(double)’ __MATHCALL (j1,, (_Mdouble_)); ^ user.cpp: In function ‘int main()’: user.cpp:23:11: error: assignment of function ‘double j1(double)’ j1=v[i].j1; ^ user.cpp:23:11: error: cannot convert ‘int’ to ‘double(double)throw ()’ in assignment user.cpp:27:49: warning: pointer to a function used in arithmetic [-Wpointer-arith] vmax=vt,nrvmax=2*(abs(i1-i2)+abs(j1-j2)); ^ user.cpp:27:51: error: call of overloaded ‘abs(double (*)(double)throw ())’ is ambiguous vmax=vt,nrvmax=2*(abs(i1-i2)+abs(j1-j2)); ^ user.cpp:27:51: note: candidates are: In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:47, from user.cpp:1: /usr/include/stdlib.h:771:12: note: int abs(int) <near match> extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^ /usr/include/stdlib.h:771:12: note: no known conversion for argument 1 from ‘double (*)(double)throw ()’ to ‘int’ In file included from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:47:0, from user.cpp:1: /usr/include/c++/4.8/cstdlib:174:3: note: long long int std::abs(long long int) <near match> abs(long long __x) { return __builtin_llabs (__x); } ^ /usr/include/c++/4.8/cstdlib:174:3: note: no known conversion for argument 1 from ‘double (*)(double)throw ()’ to ‘long long int’ /usr/include/c++/4.8/cstdlib:166:3: note: long int std::abs(long int) <near match> abs(long __i) { return __builtin_labs(__i); } ^ /usr/include/c++/4.8/cstdlib:166:3: note: no known conversion for argument 1 from ‘double (*)(double)throw ()’ to ‘long int’ user.cpp:30:46: warning: pointer to a function used in arithmetic [-Wpointer-arith] nrvmax+=2*(abs(i1-i2)+abs(j1-j2)); ^ user.cpp:30:48: error: call of overloaded ‘abs(double (*)(double)throw ())’ is ambiguous nrvmax+=2*(abs(i1-i2)+abs(j1-j2)); ^ user.cpp:30:48: note: candidates are: In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:47, from user.cpp:1: