Eroare de compilare: user.cpp:11:18: error: ‘char rand [5000000]’ redeclared as different kind of symbol char rand[5000000] ; ^ In file included from /usr/local/include/c++/4.8.0/cstdlib:72:0, from /usr/local/include/c++/4.8.0/ext/string_conversions.h:41, from /usr/local/include/c++/4.8.0/bits/basic_string.h:2817, from /usr/local/include/c++/4.8.0/string:52, from /usr/local/include/c++/4.8.0/bits/locale_classes.h:40, from /usr/local/include/c++/4.8.0/bits/ios_base.h:41, from /usr/local/include/c++/4.8.0/ios:42, from /usr/local/include/c++/4.8.0/istream:38, from /usr/local/include/c++/4.8.0/fstream:38, from user.cpp:1: /usr/include/stdlib.h:380:12: error: previous declaration of ‘int rand()’ extern int rand (void) __THROW; ^ user.cpp: In function ‘int main()’: user.cpp:19:33: error: cannot convert ‘int (*)()throw ()’ to ‘char*’ for argument ‘1’ to ‘char* fgets(char*, int, FILE*)’ fgets( rand , 5000000 , fin ) ; ^ user.cpp:23:25: warning: pointer to a function used in arithmetic [-Wpointer-arith] for ( i = 1 ; rand[i] != 0 ; i ++ ) ^ user.cpp:25:20: warning: pointer to a function used in arithmetic [-Wpointer-arith] if ( rand[i] == '-' ) ^ user.cpp:25:25: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if ( rand[i] == '-' ) ^ user.cpp:29:25: warning: pointer to a function used in arithmetic [-Wpointer-arith] else if ( rand[i] >= '0' && rand[i] <= '9' ) ^ user.cpp:29:30: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] else if ( rand[i] >= '0' && rand[i] <= '9' ) ^ user.cpp:29:43: warning: pointer to a function used in arithmetic [-Wpointer-arith] else if ( rand[i] >= '0' && rand[i] <= '9' ) ^ user.cpp:29:48: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] else if ( rand[i] >= '0' && rand[i] <= '9' ) ^ user.cpp:31:42: warning: pointer to a function used in arithmetic [-Wpointer-arith] numar = numar * 10 + ( rand[i] - '0' ) ; ^ user.cpp:31:46: warning: pointer to a function used in arithmetic [-Wpointer-arith] numar = numar * 10 + ( rand[i] - '0' ) ; ^ user.cpp:31:50: warning: pointer to a function used in arithmetic [-Wpointer-arith] numar = numar * 10 + ( rand[i] - '0' ) ; ^