文字列ベクトルのサンプルコードは次のとおりです。
vector<string> strings;
strings.push_back(argv[0]);
cout << strings[0] << endl;
strings.clear();
exit(0);
しかし、valgrindは言います:
==26012== HEAP SUMMARY:
==26012== in use at exit: 8 bytes in 1 blocks
==26012== total heap usage: 2 allocs, 1 frees, 41 bytes allocated
==26012==
==26012== 8 bytes in 1 blocks are still reachable in loss record 1 of 1
==26012== at 0x4C2B1C7: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==26012== by 0x401DCF: __gnu_cxx::new_allocator<std::string>::allocate(unsigned long, void const*) (new_allocator.h:92)
==26012== by 0x401BD8: std::_Vector_base<std::string, std::allocator<std::string> >::_M_allocate(unsigned long) (in /home/nich/IPK/2/client)
==26012== by 0x401706: std::vector<std::string, std::allocator<std::string> >::_M_insert_aux(__gnu_cxx::__normal_iterator<std::string*, std::vector<std::string, std::allocator<std::string> > >, std::string const&) (vector.tcc:327)
==26012== by 0x401421: std::vector<std::string, std::allocator<std::string> >::push_back(std::string const&) (stl_vector.h:834)
==26012== by 0x401102: main (client.cc:130)
==26012==
==26012== LEAK SUMMARY:
==26012== definitely lost: 0 bytes in 0 blocks
==26012== indirectly lost: 0 bytes in 0 blocks
==26012== possibly lost: 0 bytes in 0 blocks
==26012== still reachable: 8 bytes in 1 blocks
==26012== suppressed: 0 bytes in 0 blocks
私が間違っていることは何ですか?String :: clearメソッドは文字列のデストラクタを呼び出すべきではありませんか?とにかく、私はポインタを使って別の方法を試しました。
vector<string*> strings;
strings.push_back(new string(argv[0]));
cout << *(strings[0]) << endl;
delete strings[0];
strings.clear();
exit(0);
Valgrind:
==10177== HEAP SUMMARY:
==10177== in use at exit: 8 bytes in 1 blocks
==10177== total heap usage: 3 allocs, 2 frees, 49 bytes allocated
==10177==
==10177== 8 bytes in 1 blocks are still reachable in loss record 1 of 1
==10177== at 0x4C2B1C7: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==10177== by 0x401CF9: __gnu_cxx::new_allocator<std::string*>::allocate(unsigned long, void const*) (new_allocator.h:92)
==10177== by 0x401B5C: std::_Vector_base<std::string*, std::allocator<std::string*> >::_M_allocate(unsigned long) (in /home/nich/IPK/2/client)
==10177== by 0x4016EA: std::vector<std::string*, std::allocator<std::string*> >::_M_insert_aux(__gnu_cxx::__normal_iterator<std::string**, std::vector<std::string*, std::allocator<std::string*> > >, std::string* const&) (vector.tcc:327)
==10177== by 0x4013F1: std::vector<std::string*, std::allocator<std::string*> >::push_back(std::string* const&) (stl_vector.h:834)
==10177== by 0x4010C4: main (client.cc:130)
==10177==
==10177== LEAK SUMMARY:
==10177== definitely lost: 0 bytes in 0 blocks
==10177== indirectly lost: 0 bytes in 0 blocks
==10177== possibly lost: 0 bytes in 0 blocks
==10177== still reachable: 8 bytes in 1 blocks
==10177== suppressed: 0 bytes in 0 blocks
しかし、それでも同じ問題。*argv[]からまだ到達可能なバイトなしでベクトル文字列への引数を解析する方法を教えてください。