小编jay*_*ila的帖子

当我使用"#pragma omp parallel num_threads(4)"时,为什么我没有获得不同的线程ID.在这种情况下,所有线程ID都为0.但是当我评论该行并使用默认的线程数时,我得到了不同的线程ID.注意: - 变量我使用变量tid来获取线程ID.

#include <omp.h>
#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[]) 
{
int nthreads, tid;
int x = 0;

#pragma omp parallel num_threads(4)
#pragma omp parallel private(nthreads, tid)
  {
  /* Obtain thread number */
 tid = omp_get_thread_num();
  printf("Hello World from thread = %d\n", tid);

  // /* Only master thread does this */
   if (tid == 0) 
     {
     nthreads = omp_get_num_threads();
     printf("Number of threads = %d\n", nthreads);
     }

  }


}

上述代码的输出: -

Hello World …

if如果它只是被忽略,那么在一个陈述中第一个论点的重要性是什么？例如,在:

#include<stdio.h>
main()
{
  if(1,0)
    printf("abc");
  else
    printf("qwe");
}

例如:

示例RDF字符串.

<Tom_Wilkinson_(演员)> <actedIn>"In_the_Bedroom","The_Patriot_(2000_film)","Black_Knight_(电影)","The_Last_Kiss","Cassandras_Dream"; <bornOnDate>"1948-12-12"; <isCalled>"Tom Wilkinson(Schauspieler)","טוםוילקינסון","トム·ウィルキンソン","Tom Wilkinson","וםוילקינסון","ム·ウィルキンソン"; .

给定字符串的三元组 -

<Tom_Wilkinson_(actor)> <actedIn> "In_the_Bedroom"     
<Tom_Wilkinson_(actor)> <actedIn> "The_Patriot_(2000_film)" 
<Tom_Wilkinson_(actor)> <actedIn> "Black_Knight_(film)" 
<Tom_Wilkinson_(actor)> <actedIn> "The_Last_Kiss" 
<Tom_Wilkinson_(actor)> <actedIn> "Cassandras_Dream"
<Tom_Wilkinson_(actor)> <bornOnDate> "1948-12-12"
<Tom_Wilkinson_(actor)> <isCalled> "Tom Wilkinson (Schauspieler)"

注 - 对象之间可以有空格.比方说"Tom Wilkinson(Schauspieler)"是一个包含空格的对象.