[mexFunction in Matlab] printf() function in C code

Question

shdotcom shdotcom 2019-9-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481695-mexfunction-in-matlab-printf-function-in-c-code

回答： James Tursa 2019-9-23

If I have a C code that consists of three files, Afun.c, Bfun.c and Cfun.c

int Afun (int argc, char *argv[]){)
{
    Bfun();
    
    
    // ....
    int aa  = 5;
    return aa;
}
void Bfun (void)
{
    Cfun();
}
void Cfun (void)
{
    printf ( "\n This is C function\n");
}

In the mexFunction in Matlab, how can I show the output of printf() of Cfun()? where Afun() is the main function in C code.

void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
    
    int argc = 0;
    char **argv;
    int i; result
    argc = nrhs;
    argv = (char **) mxCalloc( argc, sizeof(char *) );
    for (i = 0; i < nrhs; i++){
        argv[i] = mxArrayToString( prhs[i] );
    }
    
    // ..... 
    result = Afun(argc, argv);
    plhs[0] = mxCreateDoubleScalar(result); 
}

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Answer 1

James Tursa 2019-9-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481695-mexfunction-in-matlab-printf-function-in-c-code#answer_393148

How you have it written should work, except maybe replace printf( ) with mexPrintf( ). Also, depending on your compiler and settings, you may need to move the Bfun( ) call after the int aa definition. Are you having problems with this not displaying anything?