size of array of char c++ code example

Example 1: length of a char array in c

char chararray[10];
size_t len = strlen(chararray);

Example 2: c++ length of char*

#include <iostream>
#include <string.h>

using namespace std;

int main()
{
    char *str = "ABC";
    cout << strlen(str) << endl;
    return 0;
}