abc說明：定義 del 函數的時候，abc 的析構函數未定義，因此不會調用。看如下代碼，試解釋器運行結果

#include <stdio.h>
class abc;
void del(abc *pobj)
{
delete pobj;

}
class abc{
public:
abc()
{
printf("abc\r\n");
}
~abc()
{
printf("~abc\r\n");
}
};
int main(int argc, char *argv[])
{
abc *pobj = new abc;
del(pobj);
return 0;
}

　編譯出現警告

C:\Users\Ares\Desktop>g++ test.cpp
test.cpp: In function `void del(abc*)':
test.cpp:5: warning: possible problem detected in invocation of delete operator:
test.cpp:4: warning: `pobj' has incomplete type
test.cpp:2: warning: forward declaration of `struct abc'
test.cpp:5: note: neither the destructor nor the class-specific operator delete
will be called, even if they are declared when the class is defined.
test.cpp:27:2: warning: no newline at end of file

　　abc

說明：定義 del 函數的時候，abc 的析構函數未定義，因此不會調用。感覺有說服力么？

轉載于:https://www.cnblogs.com/westfly/archive/2011/09/15/2177259.html

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