void time_one()
{
LARGE_INTEGER one;
LARGE_INTEGER two;
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
QueryPerformanceCounter(&one);
for (int i = 0; i < 1000000000; i++)
{
}
QueryPerformanceCounter(&two);
cout << two.QuadPart * 1.0 / freq.QuadPart - one.QuadPart * 1.0 / freq.QuadPart << endl;
}
void time_two()
{
double timeStart = GetTickCount();
for (int i = 0; i < 10000000; i++)
{
}
double timeEnd = GetTickCount();
cout << timeEnd - timeStart << endl;
}
void time_three()
{
time_t stime;
time_t etime;
time(&stime);
getchar();
time(&etime);
printf(\"%ld\\n\",etime - stime);
}
void time_four()
{
double begin=(double)clock()/CLK_TCK;
for (int i = 0; i < 1000000000; i++)
{
}
double end=(double)clock()/CLK_TCK;
cout << end - begin << endl;
}
void time_five()
{
clock_t t1 = clock();
for (int i = 0; i < 1000000000; i++)
{
}
clock_t t2 = clock();
cout<<\"Total time = \"<<t2-t1<<endl;
}
责任编辑：小草
