linux 日期转换时间戳_将时间戳转为时间

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/time.h> 
#include <time.h>
long getTimestamp()
{ 

int i;
struct timeval tv;
memset(&tv, 0x00, sizeof(tv));
gettimeofday(&tv, NULL);
return tv.tv_sec;
}
void TimestamptoData(long timestamp)
{ 

struct tm *p;
char s[100] = { 
0};	
time_t t=timestamp;  
p = localtime(&t);      
memset(s, 0x00, sizeof(s));
strftime(s, sizeof(s), "%Y-%m-%d %H:%M:%S", p);
printf("%-10s%s%s\n", "data", ": ", s);  
}
int main()
{ 

long Timestamp = getTimestamp();
printf("%-10s%s%ld\n", "Timestamp", ": ",Timestamp);
TimestamptoData(Timestamp);
return 0;
}