类析构函数释放内存,VC与C++Builder/C-free中结果不同
#include <stdio.h>
#include <string.h>
class string {
public:
char *buff;
string(char *b){buff = new char[strlen(b)]; strcpy(buff, b);};
~string(){delete [] buff;};
string& operator=(const string& s){strcpy(buff, s.buff); return *this;};
};
int main(int argc, char *argv[])
{
string a("aaaa");
string b("bbbb");
printf("%s %d\n", a.buff, a.buff);
printf("%s %d\n", b.buff, b.buff);
a = b;
printf("%s %d\n", a.buff, a.buff);
printf("%s %d\n", b.buff, b.buff);
return 0;
}
VC运行最后弹一个错误对话框,而另外两个没问题,为什么