时间获取相关方法-GCC 4.9编译通过

获取当前的时间的秒数、毫秒、微秒 头文件是：sys/time.h 。 函数说明：int gettimeofday (struct timeval * tv, struct timezone * tz) #include <stdio.h> #include <sys/time.h> int main() { struct timeval tv; gettimeofday(&tv,NULL); printf("second:%ld\n",tv.tv_sec); //秒 printf("millisecond:%ld\n",tv.tv_sec*1000 + tv.tv_usec/1000); //毫秒 printf("microsecond:%ld\n",tv.tv_sec*1000000 + tv.tv_usec); //微秒 return 0; }

Output:

second:1599207344 millisecond:1599207344774 microsecond:1599207344774411 获取当前的时间的年、月、日、时、分、秒 #include <iostream> #include <time.h> using namespace std; int main() { time_t t = time(NULL); struct tm* stime=localtime(&t); char tmp[32]{0}; snprintf(tmp,sizeof(tmp),"%04d-%02d-%02d %02d:%02d:%02d",1900+stime->tm_year,1+stime->tm_mon,stime->tm_mday, stime->tm_hour,stime->tm_min,stime->tm_sec); cout<<tmp<<endl; return 0; }

Output:

2020-09-04 08:13:18 获取任务执行时间(秒) #include <stdio.h> #include <time.h> int main() { time_t t_start, t_end; t_start = time(NULL) ; int sum = 0; for(int i =0; i<1000; i++) { sum += i; } t_end = time(NULL) ; printf("sum:%d time: %.0f s\n", sum, difftime(t_end,t_start)) ; return 0; }

Output:

sum:499500 time: 0 s