strrev() function in C language

• strrev( ) function reverses a given string in C language. Syntax for strrev( ) function is given below.

char *strrev(char *string);

• strrev( ) function is non standard function which may not available in standard library in C.

  Example program for strrev() function in C language:

  • In below program, string “Hello” is reversed using strrev( ) function and output is displayed as “olleH”.
  C

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  #include<stdio.h> #include<string.h>   int main() {    char name[30] = "Hello";      printf("String before strrev( ) : %s\n",name);      printf("String after strrev( )  : %s",strrev(name));      return 0; }

   Output:

  String before strrev( ) : Hello String after strrev( )     : olleH

  Other String functions in C Language:

  • String.h header file supports all the string functions in C language. All the string functions are given below.

  S.no	String functions	Description
  1	strcat ( )	Concatenates str2 at the end of str1.
  2	strncat ( )	appends a portion of string to another
  3	strcpy ( )	Copies str2 into str1
  4	strncpy ( )	copies given number of characters of one string to another
  5	strlen ( )	gives the length of str1.
  6	strcmp ( )	Returns 0 if str1 is same as str2. Returns <0 if strl < str2. Returns >0 if str1 > str2.
  7	strcmpi ( )	Same as strcmp() function. But, this function negotiates case.  “A” and “a” are treated as same.
  8	strchr ( )	Returns pointer to first occurrence of char in str1.
  9	strrchr ( )	last occurrence of given character in a string is found
  10	strstr ( )	Returns pointer to first occurrence of str2 in str1.
  11	strrstr ( )	Returns pointer to last occurrence of str2 in str1.
  12	strdup ( )	duplicates the string
  13	strlwr ( )	converts string to lowercase
  14	strupr ( )	converts string to uppercase
  15	strrev ( )	reverses the given string
  16	strset ( )	sets all character in a string to given character
  17	strnset ( )	It sets the portion of characters in a string to given character
  18	strtok ( )	tokenizing given string using delimiter

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