C++ ＜algorithm＞之sort

对数组排序

#include 

#include 

void print(int*a, int len){
for (int i = 0; i< len; i++) {
                std::cout << a[i] << " ";
        }
        std::cout << std::endl;
}

int main(){

        int a[5] = {5,3,7,6,1};
        print(a, 5);


        std::sort(a, a+5); /* default , less -> greater*/
        print(a, 5);

        std::sort(a, a+5, std::less<int>());    /* default, same as std::sort(a, a+5); */
        print(a, 5);

        std::sort(a, a+5, std::greater<int>()); /* greater <- less */
        print(a, 5);

}

也可以是迭代器，增加函数或者仿函数实现自己的排序方法。