Write a C++ program to find the length of a string without using the library function. .

#include <iostream>
using namespace std;
void main()
{

 char str1[50];
    int i, l = 0;

       cout<<"Find the length of a string:\n ";
    cout<<"Input a string : ";
    cin>>str1;

    for (i = 0; str1[i] != '\0'; i++)
    {
        l++;
    }
    cout<<"The string contains "<<l<<" number of characters. "<<endl;
    cout<<"So, the length of the string "<<str1<<" is :"<< l;
      cout<<endl;
         system ("pause");
}


Test Data :
Input a string : welcome
Expected Output :
The string contains 7 number of characters.
So, the length of the string welcome is : 7