[C + +] Running time and Integer to String

#pragma once#include "inf.hpp" #include <stdint.h> #include <string> #include <iostream> #include < sstream> #define Buffer_size 1048576std::string int2str (int32_t p_vint); std::string int2str_oss (int32_t p_vint); std::string int2str (int32_t p_vint) {    char str[11] = {0};    int bits = 0, temp = 0;    for (int i = 0; p_vint > 1; ++bits, ++i)    {        temp = p_vint;        P_vint/=;        Str[i] = Temp-p_vint * + 0x30;    }        for (int i = 0; i < BITS/2; i++)    {        str[i] ^= str[bits-1-i];        Str[bits-1-i] ^= str[i];        Str[i] ^= str[bits-1-i];    }    Str[bits] = 0;    return std::string (str);} std::string Int2str_oss (int32_t p_vint) {     std::ostringstream oss;    OSS << P_vint;    return Oss.str ();}

　　

Running Time:

#include <windows.h>int main () {    double time = 0;    Double counts = 0;    Large_integer Nfreq;    Large_integer Nbegintime;    Large_integer Nendtime;    QueryPerformanceFrequency (&nfreq);    QueryPerformanceCounter (&nbegintime);//Start Timing      //encode ("D:/bgm_.txt", "D:/bgm2.txt");    Test    //for (int i = 0; i < 1000000; i++)    //    int2str (i);   5.33s    //for (int i = 0; i < 1000000; i++)    //    Int2str_oss (i);   23.53s    QueryPerformanceCounter (&nendtime);//Stop timer time      = (double) (Nendtime.quadpart- Nbegintime.quadpart)/(double) Nfreq.quadpart;    Std::cout << "Running time:" << time * + << "MS" << Std::endl;    return 0;

　　

[C + +] Running time and Integer to String