我正在尝试编写一个多线程程序，该程序从命令行获取数字列表并使用单独的工作线程计算各种统计值，例如平均值、总和等。我在这个程序中创建了三个线程并且它编译但我得到了错误。我是 C 和线程编程的新手，请指导我将数据传递给线程进行计算？这是我的代码：
#include<stdio.h>
#include<string.h>
#include<pthread.h>
#include<stdlib.h>
#include<unistd.h>
#define NUM_THREAD 3
int average, min, max;
void *
doSomeThing(void *param)
{
//int *id_ptr, taskid;
int *argv = (int *) param;
sleep(1);
//id_ptr=(int *) threadid;
//taskid= *id_ptr;
int j;
int sum = 0;
int upper = atoi(param);
sleep(1);
pthread_t id = pthread_self();
unsigned long i = 0;
if (id = 1) {
int i;
for (i = 0; i < upper; i++) {
sum += argv[i];
}
printf("sum of no's is :\n", sum);
}
if (id = 2) {
printf("\n Second thread processing\n");
}
if (id = 3) {
printf("\n Third thread processing\n");
}
for (i = 0; i < -1; i++);
{
pthread_exit(NULL);
}
}
int
main(int argc, char *argv[])
{
pthread_t threads[NUM_THREAD];
pthread_attr_t attr;
int *taskid[NUM_THREAD];
int i = 0;
int t;
int err;
//int input,a;
if (argc != 2) {
fprintf(stderr, "usage: a.out <integer value>\n");
return -1;
}
/*
printf("how many no's do u want to evaluate?:\n");
scanf("%d", &input);
printf("Enter the no's:\n");
for (a = 0; a < input; a++) {
arr[a] = (int) malloc(sizeof(int));
scanf("%d", &arr[a]);
printf("data:", &arr[a]);
}
*/
pthread_attr_init(&attr);
for (t = 0; t < NUM_THREAD; t++) {
taskid[t] = (int *) malloc(sizeof(int));
*taskid[t] = t;
printf("In main: creating thread %d\n", t);
err = pthread_create(&threads[t], &attr, doSomeThing, argv[1]);
if (err) {
printf("Error; return code from pthread_create() is %d\n",
err);
exit(-1);
}
}
for (t = 0; t < NUM_THREAD; t++) {
pthread_join(threads[t], NULL);
printf("Joining thread %d\n", t);
}
pthread_exit(NULL);
}