Log -demo

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>
#include <errno.h>

typedef struct data {
　　char *str;
　　long time;
　　int symbal;
} DATA;

int64_t getCurrentTime()
{
　　struct timeval tv;
　　gettimeofday(&tv,NULL); 
　　return tv.tv_sec * 1000 + tv.tv_usec / 1000;
}

int write_log(char *c){
　　FILE *fp;
　　ong curTime = getCurrentTime();
　　int line_count;

* Pt the DATA;
Pt = (the DATA *) the malloc (the sizeof (the DATA)); 
// the memcpy (Pt-> STR, C, strlen (C)); when using such an approach using arrays
pt-> str = c;
Pt-> Time = curTime;
Pt-> = symbal;
the printf ( "% S \ n-", Pt-> STR);
FP = the fopen ( "the SYSTEM.LOG", "R & lt +");
IF (FP == NULL) {
　　fprintf (stderr, "File Open the SYSTEM.LOG error% S \ n-!", the strerror (errno));
　　// doSystem ( "Touch xxxfile.log");
　　return 0;
}

while((line_count = fgetc(fp)) != EOF)
{
　　if(line_count == '\n') {
　　line_count++;
}

if (line_count < 100) {
　　//fseek(fp, sizeof(*fp), SEEK_END);
　　fwrite(pt,sizeof(DATA),1,fp);
} else {
　　//doSystem(" sed -i '0,49d' system.log ");
　　fwrite(pt,sizeof(DATA),1,fp);
}

free(pt);
fclose(fp);
return 0;
}

int main(int argc, char **argv)
{
　　char *p = "As food is to the body";
　　int ret = write_log(p);
　　printf("%d\n", ret);
　　return ret;
}