simulink C++ s-funcion data type 'char' error

My Ask is how using 'char' type variable

log:

错误使用 mex

E:\资料\SVN_USER\010-panh07\code\simulink\test.cpp: In function 'void mdlOutputs(SimStruct*, int_T)':

E:\资料\SVN_USER\010-panh07\code\simulink\test.cpp:206:28: error: invalid conversion from 'int8_T* {aka signed char*}' to 'char*' [-fpermissive]

strcpy(y0,"hello world");

^

In file included from D:\MATLAB\R2021a/simulink/include/simstruc_compcond.h:108:0,

from D:\MATLAB\R2021a/simulink/include/simstruc.h:64,

from E:\资料\SVN_USER\010-panh07\code\simulink\test.cpp:92:

D:/mingw64_gcc6.3/x86_64-w64-mingw32/include/string.h:61:18: note: initializing argument 1 of 'char* strcpy(char*, const char*)'

char * __cdecl strcpy(char * __restrict__ _Dest,const char * __restrict__ _Source);

^~~~~~

code:

/* Function: mdlOutputs =======================================================

*

*/

static void mdlOutputs(SimStruct *S, int_T tid)

{

const real_T *u0 = (real_T *) ssGetInputPortRealSignal(S, 0);

int8_T *y0 = (int8_T *) ssGetOutputPortRealSignal(S, 0);

strcpy(y0,"hello world");

test_Outputs_wrapper(u0, y0);

}