Matlab与C++混合编程 2--在C++中使用Matlab固有命令

直接在Visual Studio中运行Matlab固有命令

#include <iostream>

#include"engine.h" // 添加matlab引擎库的头文件

//PATH: D:\Program Files\MATLAB\MATLAB Runtime\v901\runtime\win64

// 包含目录: D:\Program\MATLAB\R2016a\extern\include

// 库目录: D:\Program\MATLAB\R2016a\extern\lib\win64\microsoft

// 附加依赖项: libmat.lib;libeng.lib;libmx.lib;

#pragma comment(lib, "libeng.lib")

#pragma comment(lib, "libmx.lib")

#pragma comment(lib, "libmat.lib")

using namespace std;

int main()

{

	Engine *ep;

	// 启动引擎

	if (!(ep = engOpen("\0")))

	{

		fprintf(stderr, "\n打开Matlab引擎失败！\n");

		return EXIT_FAILURE;

	}

	// 执行：

	int Nsample = 50;		//采样率50Hz,每秒50个点

	const double PI = 3.1415926;

	double *t = new double[Nsample];

	for (int i = 0; i <Nsample; i++)	//i是时间,i/N是每个采样点的时间间隔,t[i]=2*PI*t

	{

		t[i] = i * 2 * PI / Nsample;

	}

	mxArray *T = NULL, *result = NULL;

	T = mxCreateDoubleMatrix(1, Nsample, mxREAL);	//新建Double型的矩阵,1行Nsample列

	memcpy((void *)mxGetPr(T), (void *)t, Nsample * sizeof(t[0]));	//把t中数据拷贝到T中

	// 把变量T存入Matlab工作区

	engPutVariable(ep, "X", T);	//拷贝T到引擎中的X变量

	// 执行Matlab命令   

	engEvalString(ep, "Y=cos(X);");

	engEvalString(ep, "plot(X,Y);");

	engEvalString(ep, "title('y=cos(x)');");

	engEvalString(ep, "xlabel('x');");

	engEvalString(ep, "ylabel('y');");

	fgetc(stdin);

	// 清除对象，不能漏！

	mxDestroyArray(T);

	engEvalString(ep, "close;");

	// 关闭引擎，不能漏！

	engClose(ep);

	cout << "运行完成" << endl;

	return 0;

}