一个线程处于阻塞，主线程里的while（1）循环里每次输出都会错开
#include <stdio.h>
#include <pthread.h>
char t;

void* fun()
{
system("stty raw");
t = getchar();
system("stty cooked");
printf ("thread %c \n", t);
return NULL;
}

int main()
{
int err;
pthread_t ntid;
while (1){
err = pthread_create(&ntid, NULL, fun, NULL);
if (err != 0)
printf ("can't create thread\n");
printf ("*****\n");
sleep(1);
}
}

如果没有输入字符，输出就会错开

*****
*****
*****
*****
如果输入字符，就不会错开
*****
*****
*****
*****
这是为什么呢？有什么办法解决那个错开的问题？

[解决办法]
while(1)是个死循环，永远成立

“t = getchar();”

可能是输入了字符才会执行后面的语句
[解决办法]

C/C++ code

#include <stdio.h>#include <stdlib.h>#include <string.h>#ifdef WIN32    #include <windows.h>    #include <io.h>#else    #include <unistd.h>    #include <sys/time.h>    #include <pthread.h>    #define  CRITICAL_SECTION   pthread_mutex_t    #define  _vsnprintf         vsnprintf#endif//Log{#define MAXLOGSIZE 100000000#define ARRSIZE(x) (sizeof(x)/sizeof(x[0]))#include <time.h>#include <sys/timeb.h>#include <stdarg.h>char logfilename1[]="MyLog1.log";char logfilename2[]="MyLog2.log";char logstr[16000];char datestr[16];char timestr[16];char mss[4];CRITICAL_SECTION cs_log;FILE *flog;#ifdef WIN32void Lock(CRITICAL_SECTION *l) {    EnterCriticalSection(l);}void Unlock(CRITICAL_SECTION *l) {    LeaveCriticalSection(l);}#elsevoid Lock(CRITICAL_SECTION *l) {    pthread_mutex_lock(l);}void Unlock(CRITICAL_SECTION *l) {    pthread_mutex_unlock(l);}#endifvoid LogV(const char *pszFmt,va_list argp) {    struct tm *now;    struct timeb tb;    if (NULL==pszFmt||0==pszFmt[0]) return;    if (-1==_vsnprintf(logstr,ARRSIZE(logstr),pszFmt,argp)) logstr[ARRSIZE(logstr)-1]=0;    ftime(&tb);    now=localtime(&tb.time);    sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);    sprintf(timestr,"%02d:%02d:%02d",now->tm_hour     ,now->tm_min  ,now->tm_sec );    sprintf(mss,"%03d",tb.millitm);    printf("%s %s.%s %s",datestr,timestr,mss,logstr);    flog=fopen(logfilename1,"a");    if (NULL!=flog) {        fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);        if (ftell(flog)>MAXLOGSIZE) {            fclose(flog);            if (rename(logfilename1,logfilename2)) {                remove(logfilename2);                rename(logfilename1,logfilename2);            }            flog=fopen(logfilename1,"a");            if (NULL==flog) return;        }        fclose(flog);    }}void Log(const char *pszFmt,...) {    va_list argp;    Lock(&cs_log);    va_start(argp,pszFmt);    LogV(pszFmt,argp);    va_end(argp);    Unlock(&cs_log);}//Log}int main(int argc,char * argv[]) {    int i;#ifdef WIN32    InitializeCriticalSection(&cs_log);#else    pthread_mutex_init(&cs_log,NULL);#endif    for (i=0;i<10000;i++) {        Log("This is a Log %04d from FILE:%s LINE:%d\n",i, __FILE__, __LINE__);    }#ifdef WIN32    DeleteCriticalSection(&cs_log);#else    pthread_mutex_destroy(&cs_log);#endif    return 0;}