Eroare de compilare: main.cpp: In function 'double abs(int)': main.cpp:10:8: error: ambiguating new declaration of 'double abs(int)' double abs(int a) ^~~ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/c++/6/ext/string_conversions.h:41, from /usr/include/c++/6/bits/basic_string.h:5420, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/stdlib.h:774:12: note: old declaration 'int abs(int)' extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^~~ main.cpp: In function 'int main()': main.cpp:44:9: warning: unused variable 'inc2' [-Wunused-variable] int inc2 = 1, sf2 = 1, inc = 1, sf = 1; ^~~~ Non zero exit status: 1