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

1 vote150 views1 answer
Compile multiple files C++ linux
C++
15 votes132 views4 answers
2d vector
C++
1 vote169 views1 answer
Arduino notone
C++
1 vote140 views1 answer
How to ensure the user inouts a int and not anything else c++
C++
0 vote144 views1 answer
Ejemplo
C++
6 votes158 views2 answers
Strcmp
C++
0 vote188 views1 answer
C++ get maximum value unsigned int
C++
0 vote128 views1 answer
Check alphabet c++
C++
5 votes146 views1 answer
What library to mention for swap function in c++
C++
0 vote156 views3 answers
Get number round off to two decimal places c++
C++