コードは次のとおりです。
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <iostream>
using namespace std;
map<string, int> g_map;
void read_item(const pair<string, int>& p) {
g_map[p.first] += p.second;
}
void myprint(std::pair<const string, int> ci) {
cout << "first : " << ci.first << "seconde : " << ci.second << endl;
}
void myprint(int ci) {
cout << ci << endl;
}
int main()
{
string a = string("nail");
string b = string("hammer");
read_item(make_pair(a, 100));
read_item(make_pair(b, 2));
read_item(make_pair(b, 10));
read_item(make_pair(a, 200));
std::for_each(g_map.begin(), g_map.end(), myprint); // can't find the matching function here
vector<int> vec;
vec.push_back(3);
vec.push_back(3);
std::for_each(vec.begin(), vec.end(), myprint); // and here
return 0;
}
関数をオーバーロードしました。機能myprint
するはずですが、機能しません。最初myprint
をmyprint1
に、2番目をに変更するmyprint2
と機能します。どんな体も助けることができますか?コンパイルエラーは次のとおりです。
funcTemOverload.cpp: In function 'int main()':
funcTemOverload.cpp:29:54: error: no matching function for call to 'for_each(std::map<std::basic_string<char>, int>::iterator, std::map<std::basic_string<char>, int>::iterator, <unresolved overloaded function type>)'
funcTemOverload.cpp:29:54: note: candidate is:
In file included from d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/algorithm:63:0,
from funcTemOverload.cpp:2:
d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/bits/stl_algo.h:4436:5: note: template<class _IIter, class _Funct> _Funct std::for_each(_IIter, _IIter, _Funct)
d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/bits/stl_algo.h:4436:5: note: template argument deduction/substitution failed:
funcTemOverload.cpp:29:54: note: couldn't deduce template parameter '_Funct'
funcTemOverload.cpp:35:50: error: no matching function for call to 'for_each(std::vector<int>::iterator, std::vector<int>::iterator, <unresolved overloaded function type>)'
funcTemOverload.cpp:35:50: note: candidate is:
In file included from d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/algorithm:63:0,
from funcTemOverload.cpp:2:
d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/bits/stl_algo.h:4436:5: note: template<class _IIter, class _Funct> _Funct std::for_each(_IIter, _IIter, _Funct)
d:\mingw\bin\../lib/gcc/x86_64-w64-mingw32/4.7.2/include/c++/bits/stl_algo.h:4436:5: note: template argument deduction/substitution failed:
funcTemOverload.cpp:35:50: note: couldn't deduce template parameter '_Funct'