第1章 开始

《C++ Primer中文版(第三版)》

ISBN: 9787508309897

看到

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#include <assert.h>
下面是一个简单的使用示例：
assert( filename != 0 );

/*#include <iostream>using std::cout;int read(){//cout << "read()\n";return -1;}void sort(){cout << "sort()\n";}void compact(){cout << "compact()\n";}void write(){cout << "write()\n";}int main(){int count = read();if (count > 1){sort();compact();}if (count == 0){cout << "no sales for this month\n";} else// count = 1{write();}return 0;}*//* assert example */// www.cplusplus.com#include <stdio.h>#define NDEBUG #include <assert.h>void print_number(int* myInt) {assert (myInt!=NULL);printf ("%d\n",*myInt);}int main (){int a=10;int * b = NULL;int * c = NULL;b=&a;print_number (b);print_number (c);return 0;}