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可能重复:
未定义的命名空间'boost'

谁能帮我处理这个错误。非常感谢

#include "Threads.h"
#include "Interthread.h"
#include <pthread.h>


void* task1(void *arg) {
// do stuff
}

void task2() {
// do stuff
}

int main () {
//using namespace boost; 
Thread thread_1;
thread_1.start (void *(*task1)(void *arg),NULL);
// Thread thread_2 = thread(task2);

// do other stuff
//thread_2.join();
//thread_1.join ();
return 0;
 }

错误

Test.cpp:18:21: 错误: 'void' 之前的预期主表达式</p>

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