Hello: Question about using tolower()

[Faray]

Hello, this is my first post, so hopefully I am posting this in the right place.

Hopefully someone will be able to help me out with my problem here it is:


I need to make a program that ask a user to input a word. However when they input that word I need to convert the word to all lowercase letters so it can do a serach. This is my problem:

Every time I try to use tolower it gives me an error

"Cannot convert parameter 1 from 'char[11]' to 'int'

I notice that I can use this when the person only has to input one character, but when it's an entire word, tolower doesn't work.


Here is a sample of what I am trying to do (I switched some of the text around since it says don't post your source code). I tried to only put what I need, but if more code is needed, let me know I will glady add more if I need too.

#include <iostream>
#include <iomanip>
#include <string>
#include <ctype.h>
using namespace std;
 
int main ()
{
 
char word[11];
 
cout << "Please, enter the the word you need to search for";
    cin.getline(word, 11);
 
 
    word = tolower(word);
 
    cout << endl;
}
 

Any help is appreciated, thank you :)

[sicarie]

Hello, this is my first post, so hopefully I am posting this in the right place.

Hopefully someone will be able to help me out with my problem here it is:


I need to make a program that ask a user to input a word. However when they input that word I need to convert the word to all lowercase letters so it can do a serach. This is my problem:

Every time I try to use tolower it gives me an error

"Cannot convert parameter 1 from 'char[11]' to 'int'

I notice that I can use this when the person only has to input one character, but when it's an entire word, tolower doesn't work.


Here is a sample of what I am trying to do (I switched some of the text around since it says don't post your source code). I tried to only put what I need, but if more code is needed, let me know I will glady add more if I need too.

#include <iostream>
#include <iomanip>
#include <string>
#include <ctype.h>
using namespace std;
 
int main ()
{
 
char word[11];
 
cout << "Please, enter the the word you need to search for";
    cin.getline(word, 11);
 
 
    word = tolower(word);
 
    cout << endl;
}
 

Any help is appreciated, thank you :)

Did you try declaring word as a string?

[Faray]

Did you try declaring word as a string?

Hello, thanks for the fast reply

I tried declaring it as a string, it gives me some errors, it might be becuase I have more coding for the program.

I also tried something like

 
string convert = word;
 
convert = tolower(convert) ;
 
 

and I get an error

"Cannot convert from string to int"

I might be doing the declaring wrong, since I haven't worked with strings much yet.

Incase you couldn't tell, I'm not the most brillant C++ user, so forgive me if I'm sounding really stupid.

Thanks agian.

[Ganon11]

tolower() only takes a single character argument (actually passed as an integer), so you cannot pass it a character array. You will have to loop through the array and change each character individually using tolower().

Note that tolower() actually returns an integer - you have have to cast this result to a character when changing.

[Faray]

tolower() only takes a single character argument (actually passed as an integer), so you cannot pass it a character array. You will have to loop through the array and change each character individually using tolower().

Note that tolower() actually returns an integer - you have have to cast this result to a character when changing.

Alright, I'll play around with that tomorrow. I'm not 100% sure on how to do that, but I'll try it and see if I can figure it out first before I ask again. Thanks again for your help

[rajgkk]

See a program to reverse the case
Refer MSDN before posting any thing...
U can find almost all examples and hacks there.......

#include <ctype.h>
#include <string.h>
 
char msg[] = "Some of THESE letters are Capitals.";
char *p;
 
int main( void )
{
   printf( "%s\n", msg );
 
   /* Reverse case of message. */
   for( p = msg; p < msg + strlen( msg ); p++ )
   {
      if( islower( *p ) )
         putchar( _toupper( *p ) );
      else if( isupper( *p ) )
         putchar( _tolower( *p ) );
      else
         putchar( *p );
   }
}