Newb help with basic If Statement

[diZz™]

Okay well i am just experimenting with C++. I am writing a DOS based program and I am having difficulties getting this if statement to work.

#include <iostream.h>

int main()

{
char name[30];
char bob[30]="bob";
cout<<"Please enter your name: ";
cin>>name;  
if (name == bob)  
{
cout<<"U Suck"<<endl;
}
else
{
cout<<"You Rule"<<name<<endl;
}
return 0;
}

Okay what I want to happen is that when you enter bob it will say "u suck" and if you type in anything else it will say "u rule" and the name typed in.
Im sure this isnt a hard thing to do so any help is greatly appreciated.

[diZz™]

I also forgot to add when i run the program no matter what i type it always says U rule and the name.

[ygfperson]

you forgot quotation marks around the "bob"
i don't think you can compare strings with the equal sign. try strcmp()
if you want to mess with something easier, research string classes and the stl in general. it provides a string class which you can manipulate much more easily.

[diZz™]

can u point me in the dirrection of strcmp()?

[Prelude]

C strings cannot be tested for equality with the == operator, you must use one of the string comparison functions in string.h or write one of your own. Here is your code modified to use strcmp. The array with "bob" was useless since you can check for the string literal directly, so I removed it as well.

#include <iostream.h>
#include <string.h>

int main()
{
  char name[30];
  cout<<"Please enter your name: ";
  cin>>name;  
  if ( strcmp ( name, "bob" ) == 0 )  
  {
    cout<<"U Suck"<<endl;
  }
  else
  {
    cout<<"You Rule "<<name<<endl;
  }
  return 0;
}

-Prelude

[diZz™]

thanx you very much Prelude
is there any tuts on this strcmp()?

[Prelude]

>is there any tuts on this strcmp()?
There is no need for a tutorial, strcmp takes the two strings to compare (they need not be modifiable), and returns an integer greater than, equal to, or less than zero, accordingly as the first string is greater than, equal to, or less than the second.

-Prelude

[diZz™]

How would i use the strcmp() to compare 2 variables that are strings?

such as name1 and name2?

[civix]

Dangit Prelude, you beat me to it. Now I am gonna do something not nice with that pic of you that I printed out.

[Sang-drax]

This is a better way:

#include <string>
using namespace std;

//....

string name,bob = "bob";
cin >> name;
if (name == bob)
{}
else
{}

[datainjector]

Originally posted by Sang-drax
This is a better way:

#include <string>
using namespace std;

//....

string name,bob = "bob";
cin >> name;
if (name == bob)
{}
else
{}

Well even though ur way is much straight forward but thats not what he asked for ..... Has he started strings ????..

[Sang-drax]

Well, since char* is C and std::string is C++ why not learn C++ from the beginnning?

I think one should start by learning std::string and later, when learning pointers, take a look at char*.

[elad]

#include <iostream.h>
#include <string.h>

int main()
{
  char word1[80];
  char word2[80];
  char flag = 'y';

  while(flag == 'y')
  {
    cout << "enter the first word" << endl;
    cin >> word1;

    cout << "enter another word" << endl;
    cin >> word2;

    int result = strcmp(word1, word2);
    if(result == 0)
    {
       cout << "the words are identical" << endl;
    }
    else if(result > 0)
    {
       cout << "the first word is "bigger" than the second" << endl;
    }
    else
    { 
       cout << "the first word is "smaller" than the second" << endl;
     }
     cout << "do it again? y/n" << endl;
     cin >> flag;
  }
   return 0;
}

[face_master]

easier, but not as impressive.

[elad]

char * and char[] and STL string class are all C++ (at least the string class is if your compiler is STL compliant, and a lot of compilers being used today aren't, although those being sold are). In fact manipulating char[] and char* are intrinsic to understanding what is happening under the hood with the string class. If all you want to do is drive the car, use the string class. If you want to know what makes a car work, learn how to manipulate char* and char[].