我想建立一个考勤系统,它将系统日期和时间作为文件的文件名,例如:这是通常的情况.
int main () {
time_t t = time(0); // get time now
struct tm * now = localtime( & t );
cout << (now->tm_year + 1900) << '-'
<< (now->tm_mon + 1) << '-'
<< now->tm_mday
<< endl;
ofstream myfile;
myfile.open ("example.txt");
myfile << "Writing this to a file.\n";
myfile.close();
return 0;
}
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但我希望系统日期和时间代替example.txt我通过在上面的程序中包含ctime头文件来计算时间只是示例.
您可以使用strftime()函数将时间格式化为字符串,它根据您的需要提供更多格式选项.
int main (int argc, char *argv[])
{
time_t t = time(0); // get time now
struct tm * now = localtime( & t );
char buffer [80];
strftime (buffer,80,"%Y-%m-%d.",now);
std::ofstream myfile;
myfile.open (buffer);
if(myfile.is_open())
{
std::cout<<"Success"<<std::endl;
}
}
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