I want to pass a pointer to my function and allocate the memory to which this pointer points. I've read in other posts that I should pass a double pointer to this function and I did so, but I keep getting segmentation fault:

#include <iostream>
#include <stdlib.h>

using namespace std;

void allocate(unsigned char** t)
{
    *t=(unsigned char*)malloc(3*sizeof(unsigned char));
    if(*t == NULL)
        cout<<"Allcoation failed"<<endl;
    else
        for(int m=0;m<3;m++)
            *(t[m])=0;
}

int main()
{
    unsigned char* t;
    allocate(&t); 
    cout<<t[0]<<" "<<t[1]<<endl;
    return 0;
}

the result is always this: Segmentation fault (core dumped)

I don't think that there's anything missing from this code. What could be wrong?