String reverse

[rahul135]

Hi,

Below is my code to reverse a string. But when I am printing the reverse of a string it is coming out to be empty. Can somebody please help me?

  #include <iostream>
#include <string>

using namespace std;
int main()
{
int j=0;
string str;
string rstr;
cout<<"\n Enter the string:";
getline(cin,str);

for(int i =str.length()-1; i>=0; i--)
{	rstr[j] = str[i];
	j++;
}
cout<<"\n The reverse of a string is:"<<rstr;

return 0;
}

[Zhuge]

rstr starts out as the empty string, so the rstr[j] values are all invalid. You need to adjust it to the proper size before trying to edit its values.
http://www.cplusplus.com/reference/string/string/resize/

[rahul135]

got it.. thanks..