Thread: char/string hierarchy...

i need my program to use greater-than (>) and less-than (<) IF/ELSE statements for char arrays or strings. but so far, it wont work, even though my professor demonstrated it with confidence. i am using the <string> header and i tried <cstring> but that only complicated things.

is it possible to compare the values of strings without converting every character to an int value? is there anything that can be done?

Code:

#include <string>
#include <iostream>

int main()
{
    std::string str1 = "Apple";
    std::string str2 = "Pear";

    if( str1 < str2 )
        std::cout << str1 << " is less than " << str2 << std::endl;
    else if( str2 < str1 )
        std::cout << str2 << " is less than " << str1 << std::endl;
    else
        std::cout << str1 << " is equal to " << str2 << std::endl;

    return 0;
}

see, thats what i have been doing but it wont work. other people are telling me to use the <cstring> function strcmp(st1, st2) which will return 0, 1, and -1. if anyone has a better suggestion, i am all ears/eyes.

i got it working with the strcmp(x,y) function, but here is the code i was referring to earlier incase u wanted to see what i was talking about.

Code:

void insert(node *&p, char x[15])
{
	if (p==NULL)
	{
		p=new(node);
		strcpy(p->info, x);
		p->left=NULL;
		p->right=NULL;
	}
	else if(x < p->info)
	{	cout<<"inserting p->LEFT";
		insert(p->left, x);
	}
	else 
	{	cout<<"inserting p->RIGHT";
		insert(p->right, x);
	};
}

thanx for the help....

To use hk_mp5kpdw's example, this function

Code:

void insert(node *&p, char x[15])

should take c++ style string as an argument like this

Code:

void insert(node *&p, string x)

and the rest of your code will work fine