27 lines
653 B
C++
27 lines
653 B
C++
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// 函数指针适配
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// 使用 ptr_fun<>() 适配函数指针
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// <> 中的第一个参数是函数指针的类型，第二个参数是函数指针的参数类型，第三个参数是函数指针的返回值类型
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// bind1st() 和 bind2nd() 适配函数对象
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#include <iostream>
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#include <vector>
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#include <algorithm>
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using namespace std;
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bool gtn(int n1, int n2)
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{
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return n1 > n2;
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}
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int main()
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{
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int m[] = {1, 2, 2, 3, 5, 10};
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vector<int> v;
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v.assign(m, m + sizeof(m) / sizeof(m[0]));
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vector<int>::iterator ret = find_if(v.begin(), v.end(), bind2nd(ptr_fun<int, int, bool>(gtn), 3));
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cout << *ret << endl;
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return 0;
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}
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