function

[sreedhanya]

how to write c program to reverse a string without using library function & without loop?

[Humayan]

try:

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<br /> /****************************************************************<br /> * File Name : c:programshelpshell.cpp<br /> * Date : December,18,2007<br /> * Comments : new project<br /> * Compiler/Assembler :<br /> * Program Shell Generated At: 3:35:40 p.m.<br /> =-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/<br /> #include <iostream><br /> #include <string.h ><br /> //#include <conio.h ><br /> //#include <math.h ><br /> //#include <iomanip><br /> //#include <ctype.h ><br /> using namespace std;<br /> <br /> //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ FUNCTION PROTOTYPES @@@@@@@@@@@@@@@@@@@@@@@@@@<br /> void reverseString ( char * string , int length );<br /> //##################################################################################<br /> <br /> //main function ******************************<br /> int main ( )<br /> {<br /> char string [ 13 ];<br /> strcpy ( string , "hello theres" );<br /> reverseString ( string , 12 );<br /> cout << "reversed string: " << string << endl;<br /> <br /> return 0 ;<br /> }<br /> <br /> /******************************* FUNCTION DEFINITION ******************************<br /> Name : reverseString<br /> Parameters :<br /> string a(n) char * ( char * )<br /> <br /> Returns: user defined type , void<br /> Comments:<br /> <br /> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/<br /> void reverseString ( char * string , int length )<br /> {<br /> int i = length - 1;<br /> int j = 0;<br /> char temp;<br /> while ( j <= i )<br /> {<br /> temp = string [ j ];<br /> string [ j ] = string [ i ];<br /> string [ i ] = temp;<br /> j ++;<br /> i --;<br /> }<br /> return;<br /> }</iomanip></iostream>

[Humayan]

heres one without a loop:

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/****************************************************************<br /> * File Name : c:programshelpshell.cpp<br /> * Date : December,19,2007<br /> * Comments : new project<br /> * Compiler/Assembler :<br /> * Program Shell Generated At: 2:21:22 p.m.<br /> =-=-=-=-=-=-=-=--=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/<br /> <br /> #include < iostream ><br /> //#include < string.h ><br /> //#include < conio.h ><br /> //#include < math.h ><br /> //#include < iomanip ><br /> //#include < ctype.h ><br /> using namespace std;<br /> <br /> //@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ FUNCTION PROTOTYPES @@@@@@@@@@@@@@@@@@@@@@@@@@<br /> void reverseString ( char * string , int &#038; front , int &#038; rear );<br /> void reverseStringDriver ( char * string , int length );<br /> //##################################################################################<br /> <br /> //main function ******************************<br /> int main ( )<br /> {<br /> char string [ 10 ] ;<br /> strcpy ( string , "hellos" );<br /> reverseStringDriver ( string , 6 );<br /> cout << "reversed string : " << string << endl ;<br /> return 0 ;<br /> }<br /> /******************************* FUNCTION DEFINITION ******************************<br /> Name : reverseString<br /> Parameters :<br /> string a(n) char * ( char * )  ,<br /> front a(n) int ( int )  ,<br /> rear a(n) int ( int )<br /> Returns: Void type<br /> Comments:<br /> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/<br /> void reverseString ( char * string , int &#038; front , int &#038; rear )<br /> {<br /> <br /> if ( front > rear )<br /> return;<br /> char temp;<br /> <br /> temp = string [ front ];<br /> string [ front ] = string [ rear ];<br /> string [ rear ] = temp;<br /> <br /> front ++;<br /> rear --;<br /> return;<br /> }<br /> /******************************* FUNCTION DEFINITION ******************************<br /> Name : reverseStringDriver<br /> Parameters :<br /> string a(n) char *<br /> <br /> Returns: Void type<br /> Comments:<br /> <br /> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/<br /> void reverseStringDriver ( char * string , int length )<br /> {<br /> int front = 0 , rear = length - 1;<br /> reverseString ( string , front , rear );<br /> return;<br /> }<br />

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