Answer Posted / raghuram.a

#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<stdio.h>
int main()
{
int i=0,l,l1;
char str[100];
cout<<"enter string:";
gets(str);
while(str[i])
i++;
l=i;
for(i=0;i<=(l-1)/2;i++) //n/2 steps!!no extra memory
{
char t=str[i];
str[i]=str[l-i-1];
str[l-i-1]=t;
}
str[l]=0;
cout<<"\n\nreversed string is:"<<str;
getch();
return 0;
}

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