String reverse with time complexity of n/2 with out using
temporary variable.
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Answer Posted / manish pathak
//********this is perfect answer***************
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n,num,rem,l;
char s[]="abcde";
l=sizeof(s)-1;
for(i=0,j=l-1;i<=(l-1)/2;i++)//save space n/2
{
s[i]=s[i]+s[j-i];
s[j-i]=s[i]-s[j-i];
s[i]=s[i]-s[j-i];
}
s[l]='\0';
printf("%s",s);
getch();
}
| Is This Answer Correct ? | 5 Yes | 1 No |
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