linux 下 C/C++ 实现取得当前时间

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C/C++ 实现取得当前时间

1 c 语言

#include<stdio.h>#include<time.h>#include<errno.h>#include<string.h>#include<unistd.h>#define N 10int main(int argc,char *argv[]){FILE *fp;int line=0;  char buf[N];  if((fp=fopen("test.txt","a"))==NULL)  {    fprintf(stderr,"fopen failed:%s\n",strerror(errno)); return (-1);  }     while(fgets(buf,N,fp)!=NULL)  {  if(strlen(buf)<N-1||buf[N-2]=='\n')  line++;  }  while(1)  { time_t t;  time( &t); struct tm *t1;  t1=localtime(&t); sprintf(buf,"%d  %d/ %d/ %d %d:%d:%d\n",++line ,t1->tm_year+1900,                               t1->tm_mon+1, t1->tm_mday, t1->tm_hour, t1->tm_min, t1->tm_sec),printf("%s",buf);fputs(buf,fp);fflush(fp);sleep(1);  }    fclose(fp);  return 0;}

2 C++ 语言

#include<iostream>#include<ctime>using namespace std;int main(){time_t now_time;now_time = time(NULL);cout<<now_time;return 0;}

示例效果：

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