本文通过分析HDU2010省赛集训队选拔赛中的问题，揭示了在编程中使用#define可能带来的安全隐患，强调了递归在解决复杂问题时的重要性和安全性。
#define is unsafe
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 287 Accepted Submission(s): 178
Total Submission(s): 287 Accepted Submission(s): 178
Problem Description
Have you used #define in C/C++ code like the code below?
#include <stdio.h>
#define MAX(a , b) ((a) > (b) ? (a) : (b))
int main()
{
printf("%d\n" , MAX(2 + 3 , 4));
return 0;
}
Run the code and get an output: 5, right?
You may think it is equal to this code:
#include <stdio.h> <
#include <stdio.h>
#define MAX(a , b) ((a) > (b) ? (a) : (b))
int main()
{
printf("%d\n" , MAX(2 + 3 , 4));
return 0;
}
Run the code and get an output: 5, right?
You may think it is equal to this code:
#include <stdio.h> <
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