Invalid conversion error!

[Hawk11235]

Hey, I was just making a program that, when a string of numbers and letters was entered, it would strip away any numbers and output all the letters. heres my code:

#include <cstdlib>
#include <iostream>
#include <string>


using namespace std;

int main(int argc, char *argv[])
{
string input;
string a = input[0];
string b = input[1];
string c = input[2];
string d = input[3];
string e = input[4];
string f = input[5];
string g = input[6];
string h = input[7];


cout<< "This program will take a string of up to 8\n characters, and strip the numbers from it";
cout<< "\nEnter string: ";
cin>> input;



if (a.find_first_of ("1234567890") ==string::npos){
cout<< a ;
}

else if (a.find_first_of ("1234567890") != string::npos){

}


if (b.find_first_of ("1234567890") ==string::npos){
cout<< b;
}

else if (b.find_first_of ("1234567890") != string::npos){

}

if (c.find_first_of ("1234567890") ==string::npos){
cout<< c ;
}

else if (c.find_first_of ("1234567890") != string::npos){

}

if (d.find_first_of ("1234567890") ==string::npos){
cout<< d ;
}

else if (d.find_first_of ("1234567890") != string::npos){

}

if (e.find_first_of ("1234567890") ==string::npos){
cout<< e ;
}

else if (e.find_first_of ("1234567890") != string::npos){

}

if (f.find_first_of ("1234567890") == string::npos){
cout<< f ;
}

else if (f.find_first_of ("1234567890") != string::npos){

}

if (g.find_first_of ("1234567890") ==string::npos){
cout<< g ;
}

else if (g.find_first_of ("1234567890") != string::npos){

}

if (h.find_first_of ("1234567890") ==string::npos){
cout<< h ;
}

else if (h.find_first_of ("1234567890") != string::npos){

}





system("PAUSE");
return 0;
}


It says there is a conversion error for 'char' to 'const char'
Thanks

[Duthomhas]

You are going about this in the most difficult way possible.

Also, you need to have input before you start messing with it:

#include <cctype>     // isdigit()
#include <iostream>
#include <limits>     // numeric_limits
#include <string>
using namespace std;

int main()
  {
  // This is where we will put the user's string
  string input;

  // This is where we will put the modified string (user's string without numbers)
  string output;

  // Ask the user for the string
  cout << "This program will take a string (of any length) and strip all the numbers from it.\n";
  cout << "Enter the string: " << flush;
  getline( cin, input );

  // Now we can start removing stuff from the string...
  // Use a loop to iterate through all the characters in input
  // For each character that is not a digit (use the isdigit() function),
  // append it to output
  ...

  cout << "Press ENTER to quit." << flush;
  cin.ignore( numeric_input <streamsize> ::max(), '\n' );
  return 0;
  }

Please use [code] tags.

Hope this helps.

[sheheryar]

or you can take the input in an array ... then running a loop can check that the particular word/ num isdigit....if yes then delete that particular num from array....
.
.
.In the end a set of string which is free of num will remain in an array ...
just cout the array ./.. and enjoy ... its not that much hard or lines of coding program....
thanks ,..

[Hawk11235]

Thank you Duoas for this, I really didn't know any other way to do it... thanks for the help.