Question

我无法找到文本文件的平均字长。由于某种原因，我得到的输出是0。这个程序还可以找到文本文件中的单词总数，我已经找不到，只是找不到平均字长。

==6625== Memcheck, a memory error detector
==6625== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==6625== Using Valgrind-3.11.0 and LibVEX; rerun with -h for copyright info
==6625== Command: ./a.out
==6625== 
10ad_node: A, 9,  leaf, index: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 
==6625== 
==6625== HEAP SUMMARY:
==6625==     in use at exit: 72,770 bytes in 3 blocks
==6625==   total heap usage: 10 allocs, 7 frees, 73,946 bytes allocated
==6625== 
==6625== 2 bytes in 1 blocks are definitely lost in loss record 1 of 3
==6625==    at 0x4C2E0EF: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==6625==    by 0x4F593DE: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21)
==6625==    by 0x4F596E8: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (in /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21)
==6625==    by 0x4022EA: main (code.cpp:56)
==6625== 
==6625== 64 bytes in 1 blocks are definitely lost in loss record 2 of 3
==6625==    at 0x4C2E0EF: operator new(unsigned long) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==6625==    by 0x40386D: __gnu_cxx::new_allocator<int>::allocate(unsigned long, void const*) (new_allocator.h:104)
==6625==    by 0x403518: std::allocator_traits<std::allocator<int> >::allocate(std::allocator<int>&, unsigned long) (alloc_traits.h:491)
==6625==    by 0x403257: std::_Vector_base<int, std::allocator<int> >::_M_allocate(unsigned long) (stl_vector.h:170)
==6625==    by 0x402D79: void std::vector<int, std::allocator<int> >::_M_emplace_back_aux<int const&>(int const&) (vector.tcc:412)
==6625==    by 0x402B24: std::vector<int, std::allocator<int> >::push_back(int const&) (stl_vector.h:923)
==6625==    by 0x402295: main (code.cpp:49)
==6625== 
==6625== LEAK SUMMARY:
==6625==    definitely lost: 66 bytes in 2 blocks
==6625==    indirectly lost: 0 bytes in 0 blocks
==6625==      possibly lost: 0 bytes in 0 blocks
==6625==    still reachable: 72,704 bytes in 1 blocks
==6625==         suppressed: 0 bytes in 0 blocks
==6625== Reachable blocks (those to which a pointer was found) are not shown.
==6625== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==6625== 
==6625== For counts of detected and suppressed errors, rerun with: -v
==6625== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

Answer 1

第二个while循环将立即返回，因为reader已经耗尽。

while((wordCounter=reader.readLine()) !=null) {

您必须先创建一个新的reader。

平均字长.txt

1 个答案: