wcscmp() function in C++ with Examples

The wcscmp() function is defined in cwchar.h header file. The wcscmp() function is used to compares two null terminating wide string and this comparison is done lexicographically. Syntax:

int wcscmp(const wchar_t* str1, const wchar_t* str2);

Parameters: This method takes the following two parameters:

• str1: This represents the pointer to the first string to be compare.
• str2: This represents the pointer to the second string to be compare.

Return Value: This method returns:

• Zero: If the str1 and str2 are same.
• Positive value: If the first different character in str1 is greater than the corresponding character in str2.
• Negative value: If the first different character in str1 is less than the corresponding character in str2.

Time Complexity: O(n) where n is the size of the smaller string.

Auxiliary Space: O(1)

Below programs illustrate the above function:- Example 1:-

cpp

// c++ program to demonstrate
// example of wcscmp() function.

#include <bits/stdc++.h>
using namespace std;

int main()
{
    // initialize the str1
    wchar_t str1[] = L"Computer";

    // initialize the str2
    wchar_t str2[] = L"Science";

    // Compare and print results
    wcout << L"Comparing " << str1 << L" and "
        << str2 << L" = " << wcscmp(str1, str2) << endl;

    // Compare and print results
    wcout << L"Comparing " << str2 << L" and "
        << str2 << L" = " << wcscmp(str2, str2) << endl;

    // Compare and print results
    wcout << L"Comparing " << str2 << L" and "
        << str1 << L" = " << wcscmp(str2, str1) << endl;

    return 0;
}

Output:

Comparing Computer and Science = -1
Comparing Science and Science = 0
Comparing Science and Computer = 1

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