Reversing Strings

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 //REVERSING EACH WORD SENTENCE
//Downloaded From www.c4cpp.co.nr
//(C)2009.All rights reserved.
#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<ctype.h>
#include<stdio.h>
void main()
{
clrscr();
int ch,i,j,k=0,p=0,l;
char st[50],sr[50];
cout<<"Enter Your Choice : "<<endl<<"1.Each Word Reversing"<<endl<<"2.Whole Sentence Reversing"<<endl;
cin>>ch;
switch(ch)
{
case 1:
cout<<"Enter the String"<<endl;
gets(st);
l=strlen(st);
 for(i=0;i<=l;i++)
 {
 if((st[i]==' ')||(st[i]=='\0'))
 {
  for(j=i-1;j>=p;j--)
  {
  sr[k]=st[j];
  k++;
  }
 sr[k]=' ';
 k++;
 p=i+1;
 }
 }
 for(i=0;i<p;i++)
 cout<<sr[i];
break;
case 2:
cout<<"Enter the String"<<endl;
gets(st);
l=strlen(st);
p=l-1;
 for(i=l-1;i>=-1;i--)
 {
 if((st[i]==' ')||(i == -1))
 {
  for(j=i+1;j<=p;j++)
  {
  sr[k]=st[j];
  k++;
  }
 sr[k]=' ';
 k++;
 p=i-1;
 }
 }
for(i=0;i<=l;i++)
cout<<sr[i];
break;
default:
cout<<"Wrong Choice"<<endl;
break;
}
getch();
}