取走直接用，当个 demo 挺好的。
代码语言：javascript复制#include <iostream>
#include <time.h>
#include <unistd.h>
using namespace std;
int main()
{
string str;
time_t myt = time(NULL);
cout << "sizeof(time_t) is: " << sizeof(time_t) << endl;
cout << "myt is :" << myt << endl;
sleep(1);
time_t t;
time(&t);
cout << "t is:" << t << endl;
cout<<t-myt<<endl;
str = to_string(myt);
cout<<str<<endl;
cout<<str.size()<<endl;
}
