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nullptr in c++ | C++ 11

nullptr :

  In c++ NULL value is integer 0, hence leads to an ambiguity when we invoke below function.

 void foo(int i) { cout << "foo_int" << endl; }
void foo(char* pc) { cout << "foo_char*" << endl; }

 int main() {
   foo(NULL);    // Ambiguity

    // C++ 11
   foo(nullptr); // call foo(char*)
}

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