What will be the output of the following C++ code?
#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str ("Steve jobs");
cout << str.capacity() << "\n";
return 0;
}

Question

What will be the output of the following C++ code?

#include <iostream>
#include <string>
using namespace std;
int main ()
{
string str ("Steve jobs");
cout << str.capacity() << "\n";
return 0;
}

a)
9
b)
10
c)
11
d)
Not Fix

Correct answer is option 'D'. Can you explain this answer?

Answer

Explanation:

String Capacity:
- The capacity of a string is the amount of memory allocated to a string to store characters.
- It is not necessary that the capacity of a string will be equal to the length of the string.
- The capacity of a string is implementation-dependent and may vary from system to system.

Output of the code:
- In the given code, the string 'Steve jobs' is created.
- The capacity() function returns the capacity of the string 'str'.
- The output of the code will depend on the implementation of the string class in the compiler being used.
- Therefore, it is not possible to predict the exact output without knowledge of the specific compiler being used.

Correct Answer:
- Option 'D' is the correct answer as the output cannot be determined without knowing the specific implementation details of the string class in the compiler.

Answer

str.capacity() returns the size of the storage space currently allocated for the string, expressed in terms of bytes and capacity of the string may be equal or greater. So the answer is not fix, depends on the compiler.
Output:
$ g++ basicst1.cpp
$ a.out
10

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