Help me again :/

This is a discussion on Help me again :/ within the C++ Programming forums, part of the General Programming Boards category; what is wrong with this? Code: string name; cout<<"Voce deseja procurar os dados de qual pessoa?\nPS:para aparecer todos digite: TODOS\n"; ...

  1. #1
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    Help me again :/

    what is wrong with this?
    Code:
    string name;
                    cout<<"Voce deseja procurar os dados de qual pessoa?\nPS:para aparecer todos digite: TODOS\n";
                    cin>> name;
                    cin.ignore();
                    switch ( name ) {

  2. #2
    Even death may die... Dante Shamest's Avatar
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    You can't use a switch statement on name, because it's not an integer.

    edit: changed "constant integer" to "integer"
    Last edited by Dante Shamest; 10-19-2005 at 11:06 AM.

  3. #3
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    so what would be a integer? and how i could use switch with names?

  4. #4
    Even death may die... Dante Shamest's Avatar
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    Either convert the string to an integer, or use if-else with names instead of switch.

  5. #5
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    how do i convert the string to an integer? hehehe im sorry for your lost of time helping me :P

  6. #6
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    only strings that contain digits '0', '1', ... '9' can be converted to an integer. Strings such as "Hello World" cannot be converted. If the variable 'name' contains leading digits, then you can use either std::stringstream c++ class, or atoi(). Note: I didn't compile or test this so it might contain sytax errors.
    Code:
    std::string name = "123";
    std::streamstring str(name);
    int n;
    str >> n;
    // now n should be the integer 123

  7. #7
    Even death may die... Dante Shamest's Avatar
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    Code:
    #include <iostream>  // for cin
    #include <string>    // for string
    #include <sstream>   // for stringstream
    using namespace std;
    
    int main(int argc, char *argv[])
    {
      cout << "Enter an integer: " ;
      
      // Read a line into a string.
      string line ;
      getline( cin, line );
      
      // Convert the string to an integer.
      stringstream ss( line );
      int i ;
      ss >> i ;
      
      // Conversion succeeded.
      if ( !ss )
      {
        cout << "You did not enter an integer." ; 
      } 
      
      // Conversion failed.
      else
      {
        cout << "You entered " << i << endl ;
      }
      
      cin.get();  
      return 0 ;
    }

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