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我有2個數組,一個是int數組,另一個是雙數組,我需要創建struct數組,其中我保存了線程id,int,數組中的double值。我有n個元素和n個線程。我寫了下面的代碼,但不知何故,它按順序打印結果,結果沒有混合,所以我不確定它是否可以並行工作。代碼:C++ openMP數組是連續的
#include <iostream>
#include <omp.h>
using namespace std;
struct Data {
int threadNumber;
double doubleNumber;
int intNumber;
};
int main() {
int numbOfThreads = 20;
omp_set_num_threads(numbOfThreads);
double s2[50];
double s1[50];
Data allArray[50];
for (int i = 0; i < numbOfThreads; i++) {
s2[i] = i * 0.15;
s1[i] = i;
}
int threadNumber = 0;
#pragma omp parallel private(threadNumber)
{
threadNumber = omp_get_thread_num();
for (int i = threadNumber; i < 20; i++) {
allArray[i].threadNumber = threadNumber;
allArray[i].intNumber = s1[i];
allArray[i].doubleNumber = s2[i];
}
}
for (int i = 0; i < numbOfThreads; i++) {
cout << allArray[i].threadNumber << " " << allArray[i].intNumber << " " << allArray[i].doubleNumber << endl;
}
return 0;
}
和控制檯結果:
0 0 0
1 1 0.15
2 2 0.3
1 3 0.45
1 4 0.6
1 5 0.75
6 6 0.9
7 7 1.05
8 8 1.2
9 9 1.35
10 10 1.5
11 11 1.65
12 12 1.8
13 13 1.95
14 14 2.1
15 15 2.25
16 16 2.4
17 17 2.55
18 18 2.7
19 19 2.85
線程ID值的變化,但數據總是按升序排列。