Answer:
The program to this question can be given as:
Program:
#include<iostream> //include header file.
using namespace std; //using namespace
int len(string s) //define method.
{
if(s=="") //if block
{
return 0; //return value.
}
else //else block
{
return 1+len(s.erase(0,1)) ; //return value.
}
}
int main() //main method.
{
string s; //define variable.
int X1; //define variable.
cout<<"Enter string value: "; //message.
cin>>s; //input string value.
X1=len(s); //calling function that holds value in x1 variable
cout<<X1; //print variable x value.
return 0;
}
Output:
Enter string value: xxth
4
Explanation:
The description of the above C++ language program can be given as:
- In the program first, we include the header file then we define the method that is "len" in this method we pass the string variable that is "s".
- Inside the len() method, we define a conditional statement in the if block we check if the value of s variable is equal to ("") empty. It will return 0 else it will return the count value of s variable.
- Then we define a main method inside the main method we define two variable that is "s and X1".
- s is a string variable that is used to take user input from the user and pass this variable into function.
- X1 is an integer variable that is used for hold function return value and print its value.
