C – strrev() function

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  • 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:

  • In below program, string “Hello” is reversed using strrev( ) function and output is displayed as “olleH”.
#include<stdio.h>
#include<string.h>

int main()
{
   char name[30] = "Hello";

   printf("String before strrev( ) : %sn",name);

   printf("String after strrev( )  : %s",strrev(name));

   return 0;
}

 Output:

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

Other C String functions:

    • String.h header file supports all the string functions in C language. All the string functions are given below.
    • Click on each string function name below to display example programs.
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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