Protobuf UDP Message and its Types in Wireshark

How to Run a C++ Program Without Namespace?

Last Updated : 02 Nov, 2022

Prerequisite: Namespace in C++

If we want to run a program without using a namespace, we have to the std keyword along with the space resolution operator (::) in every printing line and variable declaration,

For example,

std::cout<<"geeksforgeeks";

Example:

C++

// C++ Program without the use of using namespace std; 
#include <iostream> 
#include <string> 
  
int main() 
{ 
  
    std::cout << "geeksforgeeks"; 
    return 0; 
}

Output

geeksforgeeks

Example:

C++

// C++ Program without the use of using namespace std 
#include <bits/stdc++.h> 
  
int main() 
{ 
  
    int a = 5; 
    int b = 10; 
    int c = a + b; 
    std::cout << c << std::endl; 
    return 0; 
}

Output

Protobuf UDP Message and its Types in Wireshark

GeeksforGeeks

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CPP

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