c++ - C++:使用STL vector 时出现什么错误

我使用的是topcoder C++编译器，尽管此代码在Linux gcc中运行良好，但topcoder编译器却出现此错误:

your code did not compile:

errors compiling:

Your class or method was improperly declared: In function
   ‘std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,
   std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > _wrapper::thunk(std::string)’:

Your class or method was improperly declared:20034:
error: conversion from ‘void’ to non-scalar type
‘std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >,
std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > >’ requested

这是标记错误的代码段:

class BinaryCode {

    public:
            static int get_digit(char c)
            {
                    return (c-'0');
            }
            void decode(string decd)
            {
                    int i;

                    std::vector <int> decoded(decd.size());
                    std::transform(decd.begin(), decd.end(), decoded.begin(), &get_digit);

                    int length=decoded.size();

这是topcoder问题描述:

Definition Class:BinaryCode
Method:decode

Parameters:string
Returns:vector <string>

Method signature:
vector <string> decode(string message)

(确保您的方法是公开的)

最佳答案

您的方法签名是:

void decode(string decd)

应该:

vector <string> decode(string message)

TopCoder使用测试代码来编译问题的代码。确保您提供的代码符合问题陈述中的要求。