関連ワード:  length of string using function in c    length of string without using library function in c    length of string without using inbuilt function in c    length of string function in c++    length of string function in cpp    size of string function in c++    size of string function in cpp    find the length of string without using strlen function in c++    length of string in c# without using function    program to find length of string without using library function in c