C++ 将字符串转换成date类型的数据

#include <time.h>       /* time_t, struct tm, time, localtime, strftime */
#include <string>
#include <iostream>
#include <vector>

char* asctime(const struct tm *timeptr){

static const char mon_name[][4] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
static char result[13];
sprintf(result, "%.3s%3d %d\n",
mon_name[timeptr->tm_mon],
timeptr->tm_mday,
1900 + timeptr->tm_year);

return result;
}

//change string to int
int parse_int(const char* str) {

int value = atoi(str);

return value;
}

struct tm* stringToDate(const std::string dateString, const std::string splitstr){

std::string datestr = dateString;

std::vector<int> yymmdd(3,0);

std::size_t frist = datestr.find(splitstr);
std::size_t last = datestr.find_last_of(splitstr);
/*
std::cout <<"year:" << datestr.substr(0, frist) << std::endl;
std::cout <<"month:" << datestr.substr(frist + 1, last - frist - 1) << std::endl;
std::cout <<"day:"<< datestr.substr(last + 1, datestr.length()) << std::endl;

*/

time_t rawtime;
struct tm * timeinfo;

time (&rawtime);
timeinfo = localtime (&rawtime);

//将上面取得的数转换成int型数据后 存入vector yymmdd中
yymmdd[0] = parse_int(datestr.substr(0, frist).c_str());
yymmdd[1] = parse_int(datestr.substr(frist + 1, last - frist - 1).c_str());
yymmdd[2] = parse_int(datestr.substr(last + 1, datestr.length()).c_str());

timeinfo->tm_mday = yymmdd[2];
timeinfo->tm_mon = yymmdd[1] - 1;
timeinfo->tm_year = yymmdd[0] -1900;

return timeinfo;
}

int main (){
std::string mystr = "2009-08-15";

printf ("You input date is: %s", asctime(stringToDate(mystr,"-")));
return 0;
}