#include <stdio.h>
#include <stdlib.h>

int main()
{

    const char *testArr1[] = {"one","two"};
    const char *testArr2[] = {"one"};
    const char *testArr3[] = {0};

    unsigned int num;

    num = sizeof testArr1 / sizeof *testArr1;

    printf("testArr1: %d\n", num);

    num = sizeof testArr2 / sizeof *testArr2;

    printf("testArr2: %d\n", num);

    num = sizeof testArr3 / sizeof *testArr3;

    printf("testArr3: %d\n", num);

    if( num==1 && testArr3[0] == NULL) printf("null\n");

    return 0;
}

/*
output:

testArr1: 2
testArr2: 1
testArr3: 1
null

*/