What will be the output of the following C++ code?#include <iostream>#include <string>#include <cstdlib>using namespace std;int main(int argc, char const *argv[]){int &q = NULL;cout<< q;return 0;}

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What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
int main(int argc, char const *argv[])
{
int &q = NULL;
cout<< q;
return 0;
}

What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
int main(int argc, char const *argv[])
{
int &q = NULL;
cout<< q;
return 0;
}
a) NULL
b) 0
c) Address of NULL
d) error

Answer: d
Explanation: NULL cannot be assigned to references therefore the program gives error. Here it is an int reference and NULL is not an int therefore cannot be assigned to this reference.

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What will be the output of the following C++ code?#include <iostream>#include <string>#include <cstdlib>using namespace std;int main(int argc, char const *argv[]){int &q = NULL;cout<< q;return 0;}

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What will be the output of the following C++ code?
#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
int main(int argc, char const *argv[])
{
int &q = NULL;
cout<< q;
return 0;
}