Compare two strings input by the user.

[jonlande]

#pragma once

#include "targetver.h"

#include <stdio.h>
#include <tchar.h>
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
#include <cstring>
#include <iomanip>
#include <cstdlib>

#include "stdafx.h"
#include <stdio.h>



int compare (void* ptr1, void*ptr2);

int _tmain (int argc, _TCHAR* argv[])
{
//local declarations
char a;
char*a=&a;
char b;
char*b=&b;
char lrg;
cout<<"Please enter two strings";
cin>>a;
cin>>b;

//statements
lrg=(*(int*) strcmp (&a, &b));
//char a[]<>char b[];
int strcmp=((a>b)? a: b);
for (int i=0; (a+i)!='\0'; i++)
cout<<"Larger string is:"<<compare(&a,&b);
return 0;
}

int compare (void* ptr1, void*ptr2)
{
if(*(int*)ptr1 >= *(int*)ptr2)
return 1;
else
return -1;
}

The errors I get are:
error C2040: 'a' : 'char *' differs in levels of indirection from 'char'
1>c:\users\jonathan\documents\visual studio 2010\projects\prog8-30\prog8-30\prog8-30.cpp(17): error C2040: 'b' : 'char *' differs in levels of indirection from 'char'
1>c:\users\jonathan\documents\visual studio 2010\projects\prog8-30\prog8-30\prog8-30.cpp(20): error C2088: '>>' : illegal for class
1>c:\users\jonathan\documents\visual studio 2010\projects\prog8-30\prog8-30\prog8-30.cpp(21): error C2088: '>>' : illegal for class
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

How do I resolve?

[Josue Molina]

#include <iostream>

using namespace std;

int main()
{
    cout << "Enter two strings:";
    string s1, s2;
    cin >> s1 >> s2;

    if (s1.length() > s2.length())
    {
        cout << s1 << " is the larger string.";
    }
    else if (s1.length() < s2.length())
    {
        cout << s2 << " is the larger string.";
    }
    else
    {
        cout << "The strings have the same length.";
    }

    cin.get();

    return 0;
}

[28poGNh0]

Why the complixity

supposed that z>y>.....>a>Z>Y>.....>A

I suggest this program

# include <iostream>
# include <cstdio>
# include <cstring>
using namespace std;

int main()
{
	char firstStr[100],secondStr[100];

	cout << "Please enter the first strings -> ";gets(firstStr);
	cout << "Please enter the second strings -> ";gets(secondStr);

	int i = strcmp(firstStr,secondStr);

	if(i==0)
	{
	    cout << "The two strings are equal" << endl;
	}else if(i>0)
	{
	    cout << "The first string is greather than the second string" << endl;
	}else cout << "The second string is greather than the first string" << endl;

	return 0;
}

[28poGNh0]

@Josue Molina

what if I want my first string to be "hello word" and the second "this word"

you will notice that we cannot get the second string because you use cin >> statement maybe its better that you use getline function

also my program works only for smaller strings try not to enter more than 100 character

[Superdude]

Why don't you just use a std::string??

[28poGNh0]

I prefer using string .In fact I only work with strings .It just when It comes for beginers I write code using the old c string style because they begin with them first

my program's second version will be

# include <iostream>
using namespace std;

int main()
{
	string firstStr,secondStr;

	cout << "Please enter the first strings -> ";getline(cin,firstStr);
	cout << "Please enter the second strings -> ";getline(cin,secondStr);

	int i = firstStr.compare(secondStr);

	if(i==0)
	{
	    cout << "The two strings are equal" << endl;
	}else if(i>0)
	{
	    cout << "The first string is greather than the second string" << endl;
	}else cout << "The second string is greather than the first string" << endl;

	return 0;
}

[Superdude]

I never used or use c-strings though I am a little more than a beginner.