#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

bool IsOdd (int i) {
 return ((i%2)==1);
}

int main () {
 vector<int> myvector;
 vector<int>::iterator it;

 myvector.push_back(10);
 myvector.push_back(25);
 myvector.push_back(40);
 myvector.push_back(55);

 it = find_if (myvector.begin(), myvector.end(), IsOdd);
 cout << "The first odd value is " << *it << endl;

 return 0;
}

運(yùn)行結(jié)果：

The first odd value is 25

如果把上述代碼加入到類里面，寫成類的成員函數(shù)，又是什么效果呢？

比如如下類代碼：

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

class CTest
{
public:
 bool IsOdd (int i) {
  return ((i%2)==1);
 }

 int test () {
  vector<int> myvector;
  vector<int>::iterator it;
  myvector.push_back(10);
  myvector.push_back(25);
  myvector.push_back(40);
  myvector.push_back(55);
  it = find_if (myvector.begin(), myvector.end(), IsOdd);
  cout << "The first odd value is " << *it << endl;
  return 0;
 }
};
int main()
{
 CTest t1;
 t1.test();
 return 0;
}

會(huì)出現(xiàn)類似下面的錯(cuò)誤：

error C3867: 'CTest::IsOdd': function call missing argument list; use '&CTest::IsOdd' to create a pointer to member

今天我就遇到了這個(gè)問題，這里把解決方案貼出來，僅供參考：

it = find_if (myvector.begin(), myvector.end(), IsOdd);

改為：

it = find_if(myvector.begin(), myvector.end(),std::bind1st(std::mem_fun(&CTest::IsOdd),this));

用bind1st函數(shù)和mem_fun函數(shù)加上this指針搞定的。

完整實(shí)例代碼點(diǎn)擊此處本站下載。

希望本文所述對大家的C++程序設(shè)計(jì)有所幫助。

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