C++ get random via random_device, mt19937_64,uniform_int_distribution, quick sort
#include <chrono> #include <ctime> #include <fstream> #include <iostream> #include <random> #include <sstream> #include <thread> #include <unistd.h> #include <uuid/uuid.h> using namespace std; char *dtValue=(char*)malloc(20); char *uuidValue=(char*)malloc(40); char* getTimeNow() { time_t rawTime=time(nullptr); struct tm tmInfo=*localtime(&rawTime); strftime(dtValue,20,"%Y%m%d%H%M%S",&tmInfo); return dtValue; } char *getUuid() { uuid_t newUUID; uuid_generate(newUUID); uuid_unparse(newUUID,uuidValue); return uuidValue; } random_device rd; mt19937_64 mt(rd()); template<typename T> T getRandom(T min,T max) { uniform_int_distribution<T> uid(min,max); return uid(mt); } template<typename T> void swap(T *left,T *right) { T temp=*left; *left=*right; *right=temp; }
template<typename T>
int partitionAsc(T *arr,int low,int high)
{
T pivot=arr[high];
int i=low-1;
for(int j=low;j<=high;j++)
{
if(arr[j]<pivot)
{
i=i+1;
swap<T>(&arr[i],&arr[j]);
}
}
swap<T>(&arr[i+1],&arr[high]);
return i+1;
}
template<typename T> void quickSortAsc(T* arr,int low,int high) { if(low<high) { int pivot=partitionAsc(arr,low,high); quickSortAsc(arr,low,pivot-1); quickSortAsc(arr,pivot+1,high); } } template<typename T> void getTArray(T *arr,T min,T max,int len) { for(int i=0;i<len;i++) { arr[i]=getRandom<T>(min,max); } } template<typename T> void printTArray(T *arr,int len) { for(int i=0;i<len;i++) { cout<<arr[i]<<"\t"; } cout<<endl<<endl<<endl; } template<typename T> void arrayTDemo(T min,T max,int len) { T *arr=new T[len]; getTArray(arr,min,max,len); cout<<"Before quick sort:"<<endl; printTArray(arr,len); quickSortAsc(arr,0,len-1); cout<<"After quick sort:"<<endl; printTArray(arr,len); delete []arr; cout<<getTimeNow()<<","<<__FUNCTION__<<","<<__LINE__<<endl; } int main(int args,char **argv) { arrayTDemo<uint32_t>(0,UINT32_MAX,atoi(argv[1])); }
g++ -g -std=c++2a -I. *.cpp -o h1 -luuid
./h1 100000