C++ shared pointer operator bool

#include <iostream>
#include <memory>
 
void report(std::shared_ptr<int> ptr) {
    if (ptr) {
        std::cout << "*ptr=" << *ptr << "\n";
    } else {
        std::cout << "ptr is not a valid pointer.\n";
    }
}
 
int main() {
    std::shared_ptr<int> ptr;
    report(ptr);
 
    ptr = std::make_shared<int>(7);
    report(ptr);
}
//output:
//ptr is not a valid pointer.
//*ptr=7

Source: en.cppreference.com

Similar codes

0 vote118 views1 answer
Pascal's triangle in c++ through pointer
C++
0 vote222 views1 answer
& in xml
C++
-1 vote124 views1 answer
I'm still here lyrics
C++
8 votes119 views2 answers
Cpp print vector
C++
5 votes122 views2 answers
Sleep c++ windows
C++
0 vote167 views1 answer
How to input a file path in c++
C++
4 votes134 views2 answers
Check uppercase c++
C++
5 votes135 views1 answer
How to disable buttons in unity
C++
15 votes184 views6 answers
Factorial
C++
0 vote199 views1 answer
Time and date (tm structure ) in C++
C++