把写内容过程中经常用的内容记录起来，如下内容是关于C++快速排序算法，用到了函数指针的内容。
#include <iostream>
#include <algorithm>
#include <string>
#include <cctype>
struct example{
int id;
std::string name;
};
template <class T>
template <class T>
bool intCheck(int a, int b){
return (a < b);
}
bool stringCheck(std::string a, std::string b){
for(int i = 0; i < a.length(); i++)
a[i] = tolower(a[i]);
for(int i = 0; i < b.length(); i++)
b[i] = tolower(b[i]);
if(strcmp(a.c_str(), b.c_str()) >= 0)
return false;
else return true;
}
bool exampleCheck(example a, example b){
if(strcmp(a.name.c_str(), b.name.c_str()) >= 0) return false;
else return true;
}
int iArray[] = { 2, 1, 56, 213, 2, 32, 32216, 14 };
std::string sArray[] = { "Hello", "how are you?", "elephant", "aaah!", "zzzzz", "queen" };
example structArray[] = { {1, "Joe"},
{4, "Billy"},
{2, "Zander"},
{3, "Tom"} };
quickSort(iArray, 0, 7, intCheck);
quickSort(sArray, 0, 5, stringCheck);
quickSort(structArray, 0, 3, exampleCheck);
std::cout << "Integers:" << std::endl;
for(int i = 0; i < 8;i++)
std::cout << 't' << iArray[i] << std::endl;
std::cout << std::endl << "String:" << std::endl;
for(int i = 0; i < 6;i++)
std::cout << 't' << sArray[i] << std::endl;
std::cout << std::endl << "Structure (By name):" << std::endl;
for(int i = 0; i < 4;i++)
std::cout << "t{ " << structArray[i].id << ", " << structArray[i].name << " }" << std::endl;
std::cin.get();
return 0;
}
template <class T>
int pos = l;
std::swap(uA[r], uA[pos]);
if (l < r){
std::swap(uA[r], uA[pos]);
}
return pos;
}
template <class T>
if(r > l){
int pos = partition( uA, l, r, less );
quickSort( uA, l, pos-1, less);
quickSort( uA, pos+1, r, less);
}
}
