断言的应用

 1 #include <stdio.h>
 2 //disable the assert function if "NDEBUG" defined
 3 //#define NDEBUG
 4 #include <assert.h>
 5 
 6 void print_number(int* myInt) {
 7     assert (myInt!=NULL);
 8     printf ("%d\n",*myInt);
 9 }
10 
11 int main (int argc, char* argv[])
12 {
13     int a=10;
14     int * b = NULL;
15     int * c = NULL;
16     
17     b=&a;
18     //comment this line to generate an assert
19     //c=&argc;
20     
21     print_number (b);
22     print_number (c);
23     
24     return 0;
25 }

输出结果举例:

　　10
　　Assertion failed: myInt!=NULL, file C:\_Tasks\_VC6.0\Temp\Hello.cpp, line 7
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