ZOHO INTERVIEW QUESTION-10

QUESTION:

Given a string, we have to reverse the string without changing the position of punctuations and spaces.

 
Sample:   house no : 123@ cbe 
Output:    ebc32 1o :  nes@ uoh 

PROGRAM:

#include <stdio.h>

#include<stdlib.h>
#include<string.h>

int main() 
{
    char a[100],b[100];
    int i,k=0;
    scanf("%[^\n]s",a);
    for(i=0;i<strlen(a);i++)
    {
        if((a[i]>=97 && a[i]<=122) || (a[i]>=48 && a[i]<=57))
        {
            b[k]=a[i];
            k++;
        }
    }
    for(i=0;i<strlen(a);i++)
    {
        if((a[i]>=97 && a[i]<=122) || (a[i]>=48 && a[i]<=57))
        {
            printf("%c",b[k-1]);
            k--;
        }
        else
        printf("%c",a[i]);
    }
}