How to write SDK program for Factorial function_HLS IP

Code C - [expand]
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int Factorial(int a[NUM])
 
{
 
int i;
 
long long int fact=1;
 
for (i=1; i<=NUM; i++)
 
{
 
pragma HLS PIPELINE
 
fact = fact*i;
 
}
 
return fact;
 
}
 
SDK Codes
 
include "xfactorial.h"
 
int main() {
 
long long int result;
 
init_platform();
 
print("\r\n----\r\nFactorial Function\n\r");
 
XFactorial Xfactorial;
 
XFactorial *xfactptr=&Xfactorial;
 
XFactorial_Initialize(xfactptr,XPAR_FACTORIAL_0_DEVICE_ID);
 
XFactorial_Start(xfactptr);
 
while (!XFactorial_IsDone(xfactptr));
 
result = XFactorial_Get_return(xfactptr);
 
xil_printf("Factorial is %d\n", result);
 
cleanup_platform();
 
return 0;
 
}