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      int pthread_cond_init __P ((pthread_cond_t *__cond,__const pthread_condattr_t *__cond_attr));
¡¡¡¡ÆäÖÐcondÊÇÒ»¸öÖ¸Ïò½á¹¹pthread_cond_tµÄÖ¸Õ룬cond_attrÊÇÒ»¸öÖ¸Ïò½á¹¹pthread_condattr_tµÄÖ¸Õë¡£½á¹¹ pthread_condattr_tÊÇÌõ¼þ±äÁ¿µÄÊôÐԽṹ£¬ºÍ»¥³âËøÒ»ÑùÎÒÃÇ¿ÉÒÔÓÃËüÀ´ÉèÖÃÌõ¼þ±äÁ¿Êǽø³ÌÄÚ¿ÉÓû¹Êǽø³Ì¼ä¿ÉÓã¬Ä¬ÈÏÖµÊÇ PTHREAD_ PROCESS_PRIVATE£¬¼´´ËÌõ¼þ±äÁ¿±»Í¬Ò»½ø³ÌÄڵĸ÷¸öÏß³ÌʹÓá£×¢Òâ³õʼ»¯Ìõ¼þ±äÁ¿Ö»ÓÐδ±»Ê¹ÓÃʱ²ÅÄÜÖØÐ³õʼ»¯»ò±»ÊÍ·Å¡£
 
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#include
#include
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
void *thread1(void *);
void *thread2(void *);
int i=1;
main(void)
{
pthread_t t_a;
pthread_t t_b;
pthread_create(&t_a,NULL,thread1,(void *)NULL);
pthread_create(&t_b,NULL,thread2),(void *)NULL);
pthread_join(t_b, NULL);
pthread_mutex_destroy(&mutex);
pthread_cond_destroy(&cond);
exit(0);
}
void *thread1(void *junk)
{
for(i=1;i<=9;i++)
{
pthread_mutex_lock(&mutex);
if(i%3==0)
pthread_cond_signal(&cond);
else
printf("thead1:%d\n",i);
pthread_mutex_unlock(&mutex);
printf("Up Unlock Mutex\n");
usleep(50);
}
}
void *thread2(void *junk)
{
while(i<9)
{
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s1 = s2µÄʱºò·µ»ØÖµ =0
s1 < s2µÄʱºò·µ»ØÖÁ <0
s1 > s2µÄʱºò·µ»ØÖµ >0
 
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int strcmp(const *s1,const *s2)  ±È½Ïs1ºÍs2¡£
s1 = s2µÄʱºò·µ»ØÖµ =0
s1 < s2µÄʱºò·µ»ØÖÁ <0
s1 > s2µÄʱºò·µ»ØÖµ >0
 
char *strchr(const char *s, char c);  ·µ»ØsÖÐÊ״γöÏÖCµÄλÖõÄÖ¸Õë¡£Èç¹ûsÖв»´æÔÚcÔò·µ»ØNULL
 
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char *strstr(const char *haystack, const char *needle);·µ»ØhaystackÖÐneedle×Ö·û´®Ê״γöÏÖµÄλÖõÄÖ¸Õ루²»±È½Ï½áÊø·ûNULL£©¡£Èô¹ûûÕÒµ½Ôò·µ»ØNULL
 
 
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int strncmp(char *s1, const char *s2, size_t n);(ÕâЩ¶¼ÊÇÕë¶Ô×Ö·û´®µÄǰn¸ö×Ö·ûÀ´²Ù×÷µÄ)
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