[umair37]

how to copy one string into another using LOOPS.(i am talking about default string class)??
the code given below does not work.
please teach me

void function(string str1)
{
   string str2;
   int i=0; 
   while(str1[i]!=NULL)
   {
      str2[i]=str1[i];
      i++;
   }
}

[xpi0t0s]

Your chosen approach is not the correct one. Simply use the assignment operator:

string str1="Hello";
string str2=str1;
cout<<str2;

Output should be "Hello".