C++ Exercises: Create a new string taking the first 3 characters of a given string and return the string with the 3 characters added at both the front and back
C++ Basic Algorithm: Exercise-11 with Solution
Write a C++ program to create a string taking the first 3 characters of a given string. Then, return the string with the 3 characters added to both the front and back. If the given string length is less than 3, use whatever characters are there.
Sample Solution:
C++ Code :
#include <iostream>
using namespace std;
string test(string str)
{
if (str.length() < 3)
{
return str + str + str;
}
else
{
string front = str.substr(0, 3);
return front + str + front;
}
}
int main()
{
cout << test("Python") << endl;
cout << test("JS") << endl;
cout << test("Code") << endl;
return 0;
}
Sample Output:
PytPythonPyt JSJSJS CodCodeCod
Pictorial Presentation:

Flowchart:

C++ Code Editor:
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Next: Write a C++ program to check if a given string starts with 'C#' or not.
What is the difficulty level of this exercise?
C++ Programming: Tips of the Day
Program being compiled differently in 3 major C++ compilers. Which one is right?
GCC is correct, at least according to C++11 lookup rules. 3.4.3.1 [class.qual]/2 specifies that, if the nested name specifier is the same as the class name, it refers to the constructor not the injected class name. It gives examples:
B::A ba; // object of type A A::A a; // error, A::A is not a type name struct A::A a2; // object of type A
It looks like MSVC misinterprets it as function-style cast expression creating a temporary C with y as a constructor parameter; and Clang misinterprets it as a declaration of a variable called y of type C.
Ref: https://bit.ly/3ww1Bna
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