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• C Programming Strcmp
• Strcmp In C Case Insensitive
• Strcmp In C++

The strcmp compares two strings character by character. If the first character of two strings is equal, the next character of two strings are compared. This continues until the corresponding characters of two strings are different or a null character '0' is reached. It is defined in the string.h header file. Jul 03, 2009  if you're using std::string, you don't need strcmp, you can just use strcmp is for c-style strings (char arrays). Strcmp in C/C. The function strcmp is a built-in library function and it is declared in “string.h” header file. This function is used to compare the string arguments. It compares strings lexicographically which means it compares both the strings character.

Conclusion – strcmp in C String compare is also one form of predefined inbuild functions of string.h header file as part of the string class. There are many forms and syntaxes to represent the same, but the main advantage is to compare an array of char in any form of a string that can be used internally for comparison of characters up to null characters. Compares the C string str1 to the C string str2. This function starts comparing the first character of each string. If they are equal to each other, it continues with the following pairs until the characters differ or until a terminating null-character is reached. This function performs a binary comparison of the characters.

Compares two null-terminated byte strings lexicographically.

The sign of the result is the sign of the difference between the values of the first pair of characters (both interpreted as unsignedchar) that differ in the strings being compared.

The behavior is undefined if lhs or rhs are not pointers to null-terminated strings.

[edit]Parameters

[edit]Return value

C Programming Strcmp

Negative value if lhs appears before rhs in lexicographical order.

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Zero if lhs and rhs compare equal.

Positive value if lhs appears after rhs in lexicographical order.

[edit]Example

Output:

[edit]See also

strcmp() is a built-in library function and is declared in <string.h> header file. This function takes two strings as arguments and compare these two strings lexicographically.

Syntax::

In the above prototype, function srtcmp takes two strings as parameters and returns an integer value based on the comparison of strings.

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• strcmp() compares the two strings lexicographically means it starts comparison character by character starting from the first character until the characters in both strings are equal or a NULL character is encountered.
• If first character in both strings are equal, then this function will check the second character, if this is also equal then it will check the third and so on
• This process will be continued until a character in either string is NULL or the characters are unequal.

What does strcmp() return?

This function can return three different integer values based on the comparison:

Strcmp In C Case Insensitive

Strcmp In C++

1. Zero ( 0 ): A value equal to zero when both strings are found to be identical. That is, That is, All of the characters in both strings are same.

   // strcmp() function #include<string.h> intmain() charrightStr[] = 'g f g'; // Using strcmp() printf('Strings are equal'); printf('Strings are unequal'); printf('Value returned by strcmp() is: %d', res); }

   Output:

2. Greater than zero ( >0 ): A value greater than zero is returned when the first not matching character in leftStr have the greater ASCII value than the corresponding character in rightStr or we can also say

   // strcmp() function #include<string.h> { charleftStr[] = 'zfz'; printf('Strings are equal'); printf('Strings are unequal'); printf('Value of result: %d', res); return0;

   Output:

3. Less than Zero ( <0 ): A value less than zero is returned when the first not matching character in leftStr have lesser ASCII value than the corresponding character in rightStr.

   // strcmp() function #include<string.h> { charleftStr[] = 'bfb'; printf('Strings are equal'); printf('Strings are unequal'); printf('Value returned by strcmp() is: %d', res); }

   Output:

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