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main 主函數(shù)執(zhí)行完畢后，是否可能會(huì)再執(zhí)行一段代碼
答案：可以，可以用_onexit 注冊(cè)一個(gè)函數(shù)，它會(huì)在main 之后執(zhí)行int fn1(void), fn2(void), fn3(void), fn4 (void);
void main( void )
{
String str(“zhanglin”);
_onexit( fn1 );
_onexit( fn2 );
_onexit( fn3 );
_onexit( fn4 );
printf( “This is executed first.\n” );
}
int fn1()
{
printf( “next.\n” );
return 0;
}
int fn2()
{
printf( “executed ” );
return 0;
}
int fn3()
{
printf( “is ” );
return 0;
}
int fn4()
{
printf( “This ” );
return 0;
}
The _onexit function is passed the address of a function (func) to be called when the program terminates normally. Successive calls to _onexit create a register of functions that are executed in LIFO (last-in-first-out) order. The functions passed to _onexit cannot take parameters.
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