Question

Write a complete program using the do-while loop that prompts the user to enter a string and displays its first and last characters. Repeat until the user enter a string that contains only one character.
Here is an example to show you how the output may look like:

<output>
Enter a string ( type only one character to exit): this is my string

The first character is t
The last character is g
Enter a string ( type only one character to exit): _
<output>

Do the code in C++

Answer 1

Code:

#include<iostream>
#include<string>
using namespace std;

int main(){
   string str;//variable declaration
   while (true){
       cout << "Enter a string: ";//prompt the user to enter a string
       getline (cin, str);//take input
       //check and exit the loop if string length is 1
       if (str.length() ==1) {
           break;
       }
       //if the above condition fails, that is if the string lenght is greater than 1, the following executes
       else{
           cout << "First letter: " << str[0] << "\nLast letter: " << str[str.length()-1] << "\n";
       }
   }
   return 0;
}

Code in the image:

Please refer the following for indentation.

Output: