C++ pass function as argument with parameter

#include <iostream>
#include <uuid/uuid.h>
#include <ctime>
#include <string>
#include <sstream>
#include <unistd.h>
#include <fstream>

using namespace std;

static char *uuidValue = (char *)malloc(40);
static char *dtValue = (char *)malloc(20);

char *getTimeNow()
{
    time_t rawTime = time(NULL);
    struct tm tmInfo = *localtime(&rawTime);
    strftime(dtValue, 20, "%Y%m%d%H%M%S", &tmInfo);
    return dtValue;
}

char *getUuidValue1()
{
    uuid_t newUUID;
    uuid_generate(newUUID);
    uuid_unparse(newUUID, uuidValue);
    return uuidValue;
}

void invokeFunc(void(*funcName)(int));
void printUuidValue8(int len);

int main()
{
    invokeFunc(printUuidValue8);
    return 0;
}

void printUuidValue8(int len)
{ 
    for(int i=0;i<len;i++)
    {
        cout<<"I="<<i<<",value="<<getUuidValue1()<<",now is "<<getTimeNow()<<endl;
        sleep(1);
    }
    cout<<"Finished in printUuidValue8() and now is "<<getTimeNow()<<endl;
    free(dtValue);
    free(uuidValue);
}

void invokeFunc(void(*funcName)(int))
{
    int len=100;
    (*funcName)(len);
}