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;
}