1#include <pthread.h>
 2#include <stdio.h>
 3#include <sys/time.h>
 4#include <string.h>
 5#include <unistd.h>
 6#define MAX 10
 7int test_multiple_threads_R_and_S = 10;
 8void *set_thread(void *)
 9{
10    int i;
11    for(;;){
12        ++test_multiple_threads_R_and_S;
13        sleep(2);
14        if( test_multiple_threads_R_and_S >= 20){
15            pthread_exit(NULL); // 测试退出子线程.
16        }
17    }
18}
19
20void *read_thread(void *)
21{
22    int i;
23    for(;;){
24        printf("the value of test is %d\n", test_multiple_threads_R_and_S);
25        sleep(1);
26    }
27}
28
29int main(int argc, const char *argv[])
30{
31    int i = 0;
32    int ret = 0;
33    pthread_t id1,id2;
34
35    ret = pthread_create(&id1, NULL, set_thread, NULL);
36    if(ret)
37    {
38        printf("Create pthread error!\n");
39        return 1;
40    }
41
42    ret = pthread_create(&id2, NULL, read_thread, NULL);
43    if(ret)
44    {
45        printf("Create pthread error!\n");
46        return 1;
47    }
48
49    pthread_join(id1,NULL);
50    pthread_join(id2,NULL);
51
52    return 0;
53}