[求助]C语言文件写入问题...急...急.......
我的程序要实现的功能是:把一结构体(含10个空格和一个5位数的两种字符型数据)写入到一个磁盘文件file.txt中.然后在磁盘上直接看file.txt数据.
我的完整程序是下面:(程序有点长,看我注释的1,2,3处就可以)
#include <termios.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/signal.h>
#include <pthread.h>
#include <string.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#define BAUDRATE B9600
#define COM1 "/dev/ttyS0"
#define COM2 "/dev/ttyS1"
#define ENDMINITERM 27 /* ESC to quit miniterm */
#define FALSE 0
#define TRUE 1
volatile int STOP=FALSE;
volatile int fd;
int GET_GPS_OK=FALSE;
char GPS_BUF[1024];
static int baud=BAUDRATE;
//#define K 0.003818181
struct student {
char time[14];
char space[10];
char age[5];
};
static void delay(double);
//char *gcvt(double value,int ndigit,char *buf);
typedef struct{
int year;
int month;
int day;
int hour;
int minute;
int second;
}date_time;
typedef struct{
date_time D;//鏃堕棿
char status; //鎺ユ敹鐘舵?? double latitude; //绾?害
double longitude; //缁忓害
char NS; //鍗楀寳鏋? char EW; //涓滆タ
double speed; //閫熷害
double high; //楂樺害
}GPS_INFO;
#define USE_BEIJING_TIMEZONE
GPS_INFO gps_info;
static int GetComma(int num,char* str);
static void UTC2BTC(date_time *GPS);
static double get_double_number(char *s);
void gps_parse(char *line,GPS_INFO *GPS);
//void show_gps(GPS_INFO *GPS);
//void show_gps(GPS_INFO *GPS)
//{
//sleep(1);
//}
////////////////////////////////////////////////////////////////////////////////
//瑙ｉ噴gps鍙戝嚭鐨勬暟鎹?//0 7 0 4 6 0 6 8 0 90 0 3 0 9
//$GPRMC,091400,A,3958.9870,N,11620.3278,E,000.0,000.0,120302,005.6,W*62
//$GPGGA,091400,3958.9870,N,11620.3278,E,1,03,1.9,114.2,M,-8.3,M,,*5E
void gps_parse(char *line,GPS_INFO *GPS)
////////////////////////////////////////////////////////////////////////////////
{
int i,tmp,start,end;
char c;
char* buf=line;
c=buf[5];
if(c=='C'){//"GPRMC"
GPS->D.hour =(buf[ 7]-'0')*10+(buf[ 8]-'0');
GPS->D.minute =(buf[ 9]-'0')*10+(buf[10]-'0');
GPS->D.second =(buf[11]-'0')*10+(buf[12]-'0');
tmp = GetComma(9,buf);
GPS->D.day =(buf[tmp+0]-'0')*10+(buf[tmp+1]-'0');
GPS->D.month =(buf[tmp+2]-'0')*10+(buf[tmp+3]-'0');
GPS->D.year =(buf[tmp+4]-'0')*10+(buf[tmp+5]-'0')+2000;
//------------------------------
GPS->status =buf[GetComma(2,buf)];
GPS->latitude =get_double_number(&buf[GetComma(3,buf)]);
GPS->NS =buf[GetComma(4,buf)];
GPS->longitude=get_double_number(&buf[GetComma(5,buf)]);
GPS->EW =buf[GetComma(6,buf)];
#ifdef USE_BEIJING_TIMEZONE
UTC2BTC(&GPS->D);
#endif
}
if(c=='A'){ //"$GPGGA"
GPS->high = get_double_number(&buf[GetComma(9,buf)]);
}
}
static double get_double_number(char *s)
{
char buf[128];
int i;
double rev;
i=GetComma(1,s);
strncpy(buf,s,i);
buf[i]=0;
rev=atof(buf);
// printf("s=%s ,buf= %s,val= %f\n",s,buf,rev);
return rev;
}
////////////////////////////////////////////////////////////////////////////////
//寰楀埌鎸囧畾搴忓彿鐨勯?楀彿浣嶇疆
static int GetComma(int num,char *str)
{
int i,j=0;
int len=strlen(str);
for(i=0;i<len;i++)
{
if(str[i]==',')j++;
if(j==num)return i+1;
}
return 0;
}
//#ifdef USE_BEIJING_TIMEZONE
////////////////////////////////////////////////////////////////////////////////
//灏嗕笘鐣屾椂杞?崲涓哄寳浜?椂
static void UTC2BTC(date_time *GPS)
{
//***************************************************
//濡傛灉绉掑彿鍏堝嚭,鍐嶅嚭鏃堕棿鏁版嵁,鍒欏皢鏃堕棿鏁版嵁+1绉? GPS->second++; //鍔犱竴绉? if(GPS->second>59){
GPS->second=0;
GPS->minute++;
if(GPS->minute>59){
GPS->minute=0;
GPS->hour++;
}
}
//***************************************************
GPS->hour+=8;
if(GPS->hour>23)
{
GPS->hour-=24;
GPS->day+=1;
if(GPS->month==2 ||
GPS->month==4 ||
GPS->month==6 ||
GPS->month==9 ||
GPS->month==11 ){
if(GPS->day>30){
GPS->day=1;
GPS->month++;
}
}
else{
if(GPS->day>31){
GPS->day=1;
GPS->month++;
}
}
if(GPS->year % 4 == 0 ){//
if(GPS->day > 29 && GPS->month ==2){
GPS->day=1;
GPS->month++;
}
}
else{
if(GPS->day>28 &&GPS->month ==2){
GPS->day=1;
GPS->month++;
}
}
if(GPS->month>12){
GPS->month-=12;
GPS->year++;
}
}
}
/*--------------------------------------------------------*/
int main()
{ struct student k[10];
int ijw,q1,q2,q3;
FILE *fp;
char buff[30];
struct termios oldtio,newtio,oldstdtio,newstdtio;
struct sigaction sa;
int ok;
int i=0;
char c;
char buf[1024];
GPS_INFO GPS;
int e1;
pthread_t th_a, th_b, th_show;
void * retval;
int q,w,e,r,t,y;
struct tm *p;
char zz[14],adn[5];
int sig=6;//转锟斤拷锟斤拷锟斤拷
double s;
int j,n;
float hh;
unsigned long m[100],temp;
int fd,count; //driver is open
unsigned long result,f=0;
while(1)
{
for(e1=0;e1<10;e1++)
{
fd = open(COM1, O_RDWR );
if (fd <0) {
perror(COM1);
exit(-1);
}
tcgetattr(0,&oldstdtio);
tcgetattr(fd,&oldtio); /* save current modem settings */
tcgetattr(fd,&newstdtio); /* get working stdtio */
newtio.c_cflag = baud | CRTSCTS | CS8 | CLOCAL | CREAD;/*ctrol flag*/
newtio.c_iflag = IGNPAR; /*input flag*/
newtio.c_oflag = 0; /*output flag*/
newtio.c_lflag = 0;
newtio.c_cc[VMIN]=1;
newtio.c_cc[VTIME]=0;
/* now clean the modem line and activate the settings for modem */
tcflush(fd, TCIFLUSH);
tcsetattr(fd,TCSANOW,&newtio);/*set attrib */
// pthread_create(&th_a, NULL, keyboard, 0);
while (1)
{
read(fd,&c,1); /* com port */
buf[i++] = c;
if(c == '\n'){
strncpy(GPS_BUF,buf,i);
i=0;
GET_GPS_OK=TRUE;
break;
}
}
if(GET_GPS_OK){
GET_GPS_OK=FALSE;
gps_parse(GPS_BUF,&gps_info);
}
s=1.888888;
gcvt(s,sig,adn);
q=gps_info.D.year;
w=gps_info.D.month;
e=gps_info.D.day;
r=gps_info.D.hour;
t=gps_info.D.minute;
y=gps_info.D.second;
printf("%s\n",adn); ----------------------- > 1
printf("%d_%d_%d\n",q,w,e); ----------------------->2
printf("%d_%d_%d\n", r,t,y); --------------------->3
sprintf(zz, "%04d%02d%02d%02d%02d%02d", q, w, e, r,t,y);
strcpy( k[i].time,zz);
strcpy(k[i].space," ");
strcpy( k[i].age,adn);
}
q=gps_info.D.year;
w=gps_info.D.month;
e=gps_info.D.day;
r=gps_info.D.hour;
t=gps_info.D.minute;
y=gps_info.D.second;
sprintf(buff, "/root/%04d.%02d.%02d-%02d.%02d.txt", gps_info.D.year, gps_info.D.month, gps_info.D.day, gps_info.D.hour,gps_info.D.minute);
if((fp = fopen(buff, "a+"))== NULL)
{printf("no open");}
for(ijw = 0; ijw <10; ijw++)
{
fwrite(k+ijw, sizeof(struct student),1, fp);
fprintf(fp,"\r\n");
}
rewind(fp);
fclose(fp);
tcsetattr(fd,TCSANOW,&oldtio); /* restore old modem setings */
tcsetattr(0,TCSANOW,&oldstdtio); /* restore old tty setings */
close(fd);
}
}
1处是由S转换过来的
2,3处的值是通过串口从GPS处得来的.
这123处在计算机终端都正确显示对应的数据.
然后,把这些数据写入文件,打开被写入的文件后,发现全是乱码.
另外,把23处的时间值从系统的时钟获取,再把123处的数据写入文件,打开被写入的文件后,发现是乱码.计算机终端都正确显示对应的数据.
程序如下:
#include<stdio.h>
#include <time.h>
#include <string.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include<stdlib.h>
#include <signal.h>
//#define K 0.003818181
struct student {
char time[14];
char space[10];
char age[5];
};
static void delay(double);
//char *gcvt(double value,int ndigit,char *buf);
main()
{
// while(1)
//{
FILE *fp;
int i,q,w,e,r,t,y;
struct student k[10];
time_t timep;
struct tm *p;
char buff[30],zz[14],adn[5];
// strcpy(adn[5]," ");
int ijw;
int sig=6;//转换参数
for(i=0;i<10;i++)
{ double s;
int j,n;
float hh;
unsigned long m[100],temp;
int q,fd,count; //driver is open
unsigned long result,f=0;
s=0.1000000;
gcvt(s,sig,adn);
time(&timep);
p=gmtime(&timep);
q=(1900+p->tm_year);
w=(1+p->tm_mon);
e=p->tm_mday;
r=p->tm_hour;
t=p->tm_min;
y=p->tm_sec;
printf("%f\n",hh);
printf("%s\n",adn);
printf("%d_%d_%d\n",q,w,e);
printf("%d_%d_%d\n", r,t,y);
sprintf(zz, "%04d%02d%02d%02d%02d%02d", q, w, e, r,t,y);
strcpy( k[i].time,zz);
strcpy(k[i].space," ");
strcpy( k[i].age,adn);
sleep(1);
}
time(&timep);
p=gmtime(&timep);
q=(1900+p->tm_year);
w=(1+p->tm_mon);
e=p->tm_mday;
r=p->tm_hour;
t=p->tm_min;
sprintf(buff, "/root/%04d.%02d.%02d-%02d.%02d.txt", q, w, e, r,t);//在C盘tmp目录下保存文件，一定要先建立
//文件夹；
if((fp = fopen(buff, "a+"))== NULL)
{printf("no open");}
for(ijw = 0; ijw <10; ijw++)
{
fwrite(k+ijw, sizeof(struct student),1, fp);
fprintf(fp,"\r\n");
//fputc('\n',fp);
}//把信息写入文件
rewind(fp); //重定位文件
fclose(fp);
// return 0;
//}
}
void delay(double i)
{double j,k;
for(j=0;j<i;j++)
{k=0;
}
}
非常困惑,都是一样的数据,一个是正常显示,另一个却是乱码.
请高手帮我指点一下,不盛感谢!
