//这是一个利用当前时间作为参数来创建新文件的应用 //新文件的格式为File+时+分+秒 //应用代码首先使用time系列函数获得当前的时、分、秒信息 //然后通过组合获得对应的字符串传递给Open函数创建文件 //最后在文件中写入一个含有时间参数的字符串 #include#include #include #include int main(void) { time_t timetemp; //定义一个时间结构体变量 struct tm *p; //结构体指针 int i; char timebuf[7]; //时间信息,注意加上\0 char writetimebuf[7]; //写文件时间缓冲区 char filenamebuf[10] = "File"; //文件头 char writebuf[30]="this is a test! the time is "; char enterbuf[3]="\r\n"; //回车换行buf int fd; int temp; time(&timetemp); //获得时间参数 printf("当前时间为%s",asctime(gmtime(&timetemp))); //不需要添加回车换行符 p = localtime(&timetemp); printf("%d:%d:%d\n",p->tm_hour,p->tm_min,p->tm_sec); sprintf(timebuf,"%02d%02d%02d",p->tm_hour,p->tm_min,p->tm_sec); //将时、分秒信息按照2位前端补0的方式格式化送入时间buf printf("step1 timebuf is %s\n",timebuf); strcpy(writetimebuf,timebuf); //复制字符串 printf("writetimebuf is %s\n",writetimebuf); strcat(filenamebuf,timebuf); printf("step2 timebuf is %s\n",timebuf); printf("filenamebuf is %s\n",filenamebuf); fd = open(filenamebuf,O_RDWR|O_CREAT,S_IRWXU); //创建文件 strcat(writebuf,writetimebuf); //连接两个字符串 strcat(writebuf,enterbuf); //回车换行 temp = write(fd,writebuf,strlen(writebuf)); //写入一个字符串以表示正确 temp = close(fd); return 0; }