Write a function which takes two string variables (not C strings) as inputs and

Question

Write a function which takes two string variables (not C strings) as inputs and compares them. If they are equal, the function should return 0. If the first string is less than the second string, return a negative number. If the first string is greater than the second string, return a positive number. You are not allowed to use the compare method of the stringdata type. You must use the comparison operators. Do not write a main function. Your function does not do any cin or cout. Make sure to properly format all your code in C++.

Explanation / Answer

The strcmp() function compares two strings and returns an integer as a result of its comparison. Its syntax is:

int strcmp(const char* S1, const char* S2);
This function takes two strings, S1 and S2 and compares them. It returns

A negative value if S1 is less than S2
0 if S1 and S2 are equal
A positive value if S1 is greater than S2
#include <iostream>

using namespace std;

int main()

{

   char *FirstName1 = "Andy";

   char *FirstName2 = "Charles";

   char *LastName1 = "Stanley";

   char *LastName2 = "Stanley";

   int Value1 = strcmp(FirstName1, FirstName2);

   int Value2 = strcmp(FirstName2, FirstName1);

   int Value3 = strcmp(LastName1, LastName2);

   cout << "The result of comparing " << FirstName1

       << " and " << FirstName2 << " is " << Value1 << endl;

   cout << "The result of comparing " << FirstName2

       << " and " << FirstName1 << " is " << Value2 << endl;

   cout << "The result of comparing " << LastName1

       << " and " << LastName2 << " is " << Value3;

   return 0;

}
This would produce:

The result of comparing Andy and Charles is -2

The result of comparing Charles and Andy is 2

The result of comparing Stanley and Stanley is 0

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