Eroare de compilare: user.cpp:7:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:9:28: error: ‘ifstream’ was not declared in this scope ifstream("radixsort.in") >> N >> A >> B >> C; ^ user.cpp:9:28: note: suggested alternative: In file included from /usr/include/c++/5/ios:38:0, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/sstream:38, from /usr/include/c++/5/complex:45, from /usr/include/c++/5/ccomplex:38, from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/5/iosfwd:162:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:25:13: error: ‘b’ was not declared in this scope b[v[i] >> j * 8 & 255].push(v[i]); ^ user.cpp:32:20: error: ‘b’ was not declared in this scope while(!b[i].empty()) ^ user.cpp:41:5: error: ‘ofstream’ was not declared in this scope ofstream o("radixsort.out"); ^ user.cpp:41:5: note: suggested alternative: In file included from /usr/include/c++/5/ios:38:0, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/sstream:38, from /usr/include/c++/5/complex:45, from /usr/include/c++/5/ccomplex:38, from /usr/include/x86_64-linux-gnu/c++/5/bits/stdc++.h:52, from user.cpp:1: /usr/include/c++/5/iosfwd:165:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:43:32: error: ‘o’ was not declared in this scope for(i = 0; i < N; i += 10) o << v[i]; ^ user.cpp:11:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &N, &A, &B, &C); ^