Convert userinput to lowercase

[parvati]

Hi,
I'm having a problem with converting user input to lower case.
I'm using getline to get user input, here is my code:

int main(){
    getline (cin,input);
    for (int i=0;i<strlen(input);i++){
         input++; //<---
        }
    cout<<"Your input is:"<<input<<endl;

There's some logic bugs in the line I'm pointing at,if someone can help me with it.

Thanks a lot

[Null]

string input; // use C++ style string with getline
int main(){
    getline (cin,input);
    for (int i=0;i<input.length();i++){ // input.length() gets the length of the string
 // convert every character of input to lowercase ( I think there are other methods to do this)
         input[i]=tolower(input[i]);
        }
    cout<<"Your input is:"<<input<<endl;


}

[parvati]

Thanks a lot!
I didn't know how the tolower use...
Thanks for your help.

[Duthomhas]

You could also use the STL.

#include <algorithm>   // transform()
#include <cctype>      // toupper(), tolower()
#include <functional>  // ptr_fun()
#include <iostream>    // cin, cout
#include <string>      // getline(), string
using namespace std;

int main()
  {
  cout << "Enter something: " << flush;
  string s;
  getline( cin, s );

  transform( s.begin(), s.end(), s.begin(), ptr_fun <int, int> ( toupper ) );
  cout << "Uppercase: " << s << endl;

  transform( s.begin(), s.end(), s.begin(), ptr_fun <int, int> ( tolower ) );
  cout << "Lowercase: " << s << endl;

  return 0;
  }

Enjoy!