Question

Write a function that takes 2 inputs - A string and an integer flag (Value can be 0 or 1) • If the flag value is 'O' the function should return all the characters at even place in the input string • If the flag value is 'l'the function should return all the characters at odd place in the input string

Answer 1

Please refer the attached image

Answer 2

Answer:

#include <stdio.h>

#include <string.h>

int even_oddstr(char s[],int f)

{

   char* p=s;

  int i = 0;

   int j = 0;

   int k = 0;

    char odd[21];

   char even[21];

   while (*p )

   {

       if (i % 2 == 0)

       {

           odd[j++] = *p;

       } else

       {

           even[k++] = *p;

       }

       i++;

       p++;

   }

if(f==0){

printf("The even string is:%s\n ", even);

}

else

printf("The odd string is:%s\n ", odd);

   return(1);

}

int main(void) {

   char str[41];

   int s,flag;

   printf("Enter a string (40 characters maximum): ");

   scanf("%s", &str);

printf("Enter the Flag Value 0 or 1");

scanf("%d",&flag);

   s= even_oddstr(str,flag);

   return 0;

}

Explanation:

• The function even_oddstr( ) will take 2 inputs - A string and an integer flag (Value is 0 or 1) •
• If the flag value is 'O' the function will return all the characters at even place in the input string •
• If the flag value is 'l' the function will return all the characters at odd place in the input string.