MATLAB run cpp file (from configuration to run)

Install the compiler

Baidu experience: How to install and configure MinGW-w64 C/C++ compiler in MATLAB

1. Additional features-access to additional features-select "MinGW-w64" C/C++ compiler (search in the search box)
2. Choose the appropriate version to download and install (choose the compiler of the corresponding MATLAB version, choose the compiler version 32-bit and 64-bit)
   R2015b through R2017a____GCC 4.9.2_____http://tdm-gcc.tdragon.net
   R2017b and R2018a_______GCC 5.3______ http:// mingw-w64.org
   R2018b and later__________GCC 6.3______http://mingw-w64.org
3. Configure environment variables (corresponding to step 7 in Baidu experience)
4. Check whether the configuration is successful (enter the cmd window, enter "gcc -v" and click the Enter key, if no error is reported, it is successful) The
   
   following display is successful
   
   5. MATLAB settings, enter the matlab command line input

setenv('MW_MINGW64_LOC','C:\TDM-GCC-64')
mex -setup

Among them, "C:\TDM-GCC-64" is the installation directory of MinGW. This method needs to run this command every time you start MATLAB to use MinGW.

test

1. Create a new file in MATLAB, enter the following content, and save it as helloworld.cpp

#include "mex.h"   
    void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])   
    {
    
      
    int i;   
    i=mxGetScalar(prhs[0]); //get input parameter  
    if(i==1)   
      mexPrintf("hello,world!\n");   
    else   
      mexPrintf("大家好！！！！\n");   
    }  

2. Command line input

Annotation

The mexFunction function is the main interface for MATLAB to call C++ programs, and the function header is shown below

/*
*	nlhs 输出参数数目
*	plhs 指向输出参数的指针
*	nrhs 输入参数数目
*/
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])

For specific code meaning, please refer to: MATLAB calls C++ program