Write a program c++ to find the length of string.

Write a program c++ to find the length of string.
Find the length of string in c++.

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

int main( )

{

        clrscr( );

        char str[80];

        cout<<"Enter a string:";

        gets(str);

        for(int i=0;str[i]!='\0';i++);

        cout<<"Lenght of string is :"<<i;

        getch();

        return 0;

}