#include#include #include using namespace std; void printftmp(int n) { if (n) { printftmp(n - 1); //cout << n << " "; } } void printftmp1(int n) { if (n) { for (int i = 0; i < n; ++i) {//cout << n << " "; } } } void temp(std::function cb) { auto begintime = chrono::system_clock::now(); cb(10000); auto endtime = chrono::system_clock::now(); auto TimeCount = std::chrono::duration (endtime - begintime).count(); cout << "所用时间:" << TimeCount << "ms." << endl; } int main() { temp(std::bind(printftmp,100000)); // 递归 temp(std::bind(printftmp1, 100000)); // for循环 return 0; }
打印输出:
所用时间:2.09816ms. 所用时间:0.317457ms.



