Answer:
Following are the function
int strlen_recursive(char *str1) // recursively counts
{
static int l=0; // static variable
if(*str1==NULL) // string is equal to NULL
{
return(l); // returning length
}
else
{
l++; // increased the length
strlen_recursive(++str1); // recursive function
}
}
Explanation:
Here we are iterating over the loop and check if string is equal to NULL then it return the length of string otherwise it recursively count the length of string.
Following are the code in C language
#include <stdio.h>//heaader file
int strlen_recursive(char *str1) // recursive function
{
static int l=0;// static variable
if(*str1==NULL)
{
return(l); // return length if string is equal to null
}
else
{
l++;
strlen_recursive(++str1); // call recursive function
}
}
int main() // main function
{
char str1[100]; // declaring array
int l=0;
printf("Enter the string: ");
gets(str1);// input string
l=strlen_recursive(str1); // recursive function
printf("Total number of characters are: %d\n",l);
return 0;
}
Output:
Total number of characters are:sa
2
