cassert(assert.h)——1个

http://www.cplusplus.com/reference/cassert/assert/

声明：void assert (int expression);

 #include <iostream>
 #include <cassert>

 using namespace std;

 void cout_number(int *myInt)
 {
     assert(NULL != myInt);
     cout << "myInt===========" << *myInt << endl;
 }

 int main()
 {
     int a = ;
     int *b = NULL;
     int *c = NULL;

     b = &a;
     cout_number(b);
     cout_number(c);
     cout << "Hello World!" << endl;
     return ;
 }