在C++中使用并行数组创建包含数量和单词的列表可以通过以下步骤实现:
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <parallel/algorithm>
std::vector<std::string> words = {"apple", "banana", "orange", "grape", "watermelon"};
std::vector<int> lengths(words.size());
__gnu_parallel::transform(words.begin(), words.end(), lengths.begin(), [](const std::string& word) {
return word.length();
});
int totalWords = __gnu_parallel::reduce(lengths.begin(), lengths.end(), 0);
for (int i = 0; i < words.size(); i++) {
std::cout << "Word: " << words[i] << ", Length: " << lengths[i] << std::endl;
}
完整的代码示例如下:
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <parallel/algorithm>
int main() {
std::vector<std::string> words = {"apple", "banana", "orange", "grape", "watermelon"};
std::vector<int> lengths(words.size());
__gnu_parallel::transform(words.begin(), words.end(), lengths.begin(), [](const std::string& word) {
return word.length();
});
int totalWords = __gnu_parallel::reduce(lengths.begin(), lengths.end(), 0);
for (int i = 0; i < words.size(); i++) {
std::cout << "Word: " << words[i] << ", Length: " << lengths[i] << std::endl;
}
std::cout << "Total Words: " << totalWords << std::endl;
return 0;
}
这段代码使用了GNU Parallel STL库中的并行算法来提高计算效率。通过使用并行算法,可以同时处理多个单词,加快了计算速度。在这个例子中,我们使用了transform
算法来计算每个单词的长度,并使用reduce
算法计算单词的总数量。最后,我们打印出每个单词及其长度,并输出总单词数量。
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