how to get char array length in c++ code example

Example 1: c++ length of char array

char* example = "Lorem ipsum dolor sit amet";
int length = strlen(example);
std::cout << length << '\n'; // 26

Example 2: how to find the size of a character array in c++

Instead of sizeof() for finding the length of strings or character 
arrays, just use strlen(string_name) with the header file
#include <cstring>   
it's easier.