time_t rawtime;
        struct tm timeinfo;
        time( &rawtime );
        localtime_s( &timeinfo, &rawtime );
        strftime( log.time[ log.cnt ], 32, "%Y-%m-%d-%H-%M-%S", &timeinfo );

//可以这么写
#include<stdio.h>
#include <time.h>
void main() 
{ 
    time_t timep; 
    time (&timep); 
    printf("%s",ctime(&timep)); 
} 

//测试程序运行时间这么写
#include <stdio.h>   
#include<time.h>    

int main()   
{
    clock_t start,end;   
    start = clock();   
    //...要测试的程序部分
    end = clock();
    printf("%f\n",float((end-start)/CLK_TCK));
 
    return 0;   
}