CareerCup

compare(char *str1 , char *str2)
{
while(*str1 == *str2 && str1!=NULL && str2!=NULL)
{
str1++;
str2++;
}

if(((str1 == NULL) && (str2 == NULL)) || (*str1 == *str2) )
return 0; // equal

else if ( str1 == NULL || *str1<*str2 )
return -1; // less

else if
return 1; //greater
}

#include<iostream>
#include<string>
using namespace std;

int compareStrings(string &s1, string &s2)
{
	int i = 0;
	for(i=0;(s1[i]&&s2[i])&&(s1[i]==s2[i]);i++);
	
	if((s1[i] == '\0') && (s2[i] == '\0') )
		return 0; //cout <<"Strings are equal" <<endl;
	else if(s1[0] == '\0' || s1[0] < s2[0])
		return -1;
	else 
		return 1;
}

int main()
{
	string s1("Gajanan"),s2("Gajanan");
	//if(s1 == s2)
		//cout<<"Strings are equal" <<endl;
	//cout<<s1[0];
	//cout<<(s1);
	cout<<"Enter string1 = ";
	cin >>s1;
	cout<<"Enter string1 = ";
	cin >>s2;
	int i = compareStrings(s1,s2);
	if(i == 0)
		cout <<"Strings are equal"<<endl;
	if(i == -1)
		cout <<"First string is smaller" <<endl;
	if(i == 1)
		cout <<"Second string is smaller" <<endl;
	return 0;
}

static int strcmp(const char* s1, const char* s2)
{
int t;

if( !*s1 && !*s2)
return 0;
else if( !s1 )
return -*s2;
else if( !s2 )
return *s1;

do
{
t = *s1 - *s2;
} while(*s1++ && *s2++ && !t);
return t;
}

#include<iostream>
#include<string>

using namespace std;

int compare (string str1, string str2)
{
int i = 0;
while (i < str1.length() && i < str2.length())
{
if (str1[i] > str2[i])
return 1;
else if (str2[i] > str1s[i])
return -1;

i++;
}
if (str1.length() > i)
return 1;
else if (str2.length() > i)
return -1;

return 0;
}

int main(int argc, char argv[])
{
int compare (string str1, string str2);
string s1 = "bhushan", s2 = "bhushan";
int ret = compare(s1, s2);

cout << ret << endl;

return 0;
}

test cases can be:
1. passing equal and unequal strings
2. passing empty strings
3. passing same string with different cases

int strcmp(char *str1,char *str2)
   {
      for(;*str1==*str2;str1++,str2++)
         if(str1=='\0')
            return 0;
       return *str1-*str2;
    }

public bool String_Compare(string string1, string string2)
{
bool equal = false;



for (int i = 0; i < string2.Length; i++)
{

if (string1[i] != '\0' && string2[2] != '\0')
{
if (string1[i] == string2[i])
{
equal = true;
}
}

}

return equal;



}

Test Cases:- Equal String, Uequal String and One string will be empty