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 vote183 views1 answer
Run c++ program mac
C++
1 vote157 views1 answer
Lower bound c++
C++
0 vote181 views1 answer
Faster solutions
C++
4 votes163 views3 answers
Pi in c++
C++
0 vote156 views1 answer
Powers of 2 in cpp
C++
0 vote156 views1 answer
Cstring to string
C++
0 vote166 views2 answers
How to create array with not constant size in cpp
C++
0 vote197 views1 answer
How to use jwt in login api in node js
C++
0 vote165 views1 answer
Dynamically allocate a string object and save the address in the pointer variable p.
C++
0 vote165 views1 answer
Char vector to string c++
C++