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 = 10;
    int *b = NULL;
    int *c = NULL;

    b = &a;
    cout_number(b);
    cout_number(c);
    cout << "Hello World!" << endl;
    return 0;
}