CUDA--Thrust--数学运算(5)
Thrust有一个Transformations. 这个方法为我们进行数学运算提供了方便其中 thrust/functional.h
包含大部分内建的算法和比较操作。代码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
#include <thrust/device_vector.h> #include <thrust/transform.h> #include <thrust/sequence.h> #include <thrust/copy.h> #include <thrust/fill.h> #include <thrust/replace.h> #include <thrust/functional.h> #include <iostream> int main(void) { //allocate three device vectors with 10 elements thrust::device_vector<int>X(10); thrust::device_vector<int>Y(10); thrust::device_vector<int>Z(10); //initialize X to 0,1,2,3. thrust::sequence(X.begin(), X.end()); //compute Y=-X thrust::transform(X.begin(), X.end(), Y.begin(), thrust::negate<int>()); //fill Z with twos thrust::fill(Z.begin(), Z.end(), 2); //compute Y=X mod 2 thrust::transform(X.begin(), X.end(), Z.begin(), Y.begin(), thrust::modulus<int>()); //replace all the ones in Y with tens thrust::replace(Y.begin(), Y.end(), 1, 10); //print Y thrust::copy(Y.begin(), Y.end(), std::ostream_iterator<int>(std::cout, "\n")); return 0; }