#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <pthread.h>

#define NT         16

pthread_mutex_t  mutt;

#define A   3
#define B   4
#define C   5

int answer = 0;

void *worker(int *p);

int main(int arg, char *argv[])
{
  pthread_t thid[NT];
  int id[NT];
  int i;

  for(i=0;i<NT;i++)
    id[i] = i;

  pthread_mutex_init(&mutt, 0);

  for(i=0;i<NT;i++)
    pthread_create(&thid[i], 0, (void *) worker, (void *) &id[i]);

   for(i=0;i<NT;i++)
     pthread_join(thid[i], 0);

  printf("%d\n", answer);
}
void *worker(int *p)
{
  int tmp;
  int id;

  id = *p;
  if(id == 0){  /* adder */
    //tmp = answer;                                                                                                                                                                                                                                                           
    printf("%d\n",id);
    tmp = answer + C;
    answer = tmp;
  } else {
    printf("%d\n",id);
    tmp = A;
    tmp = tmp * B;
    answer = tmp;
  }
  return;
}
下面是输出结果
＊＊＊＊＊＊＊＊＊1
0
2
3
4
7
8
6
5
10
9
11
12
13
14
15
12
我在worker函数中每次都输出变量id，但是为什么输出结果不是0，1，2，3，4，5，6，7，8，9，10，11，12，13，14，15？谢谢大家了